LUdng Qlnh Hii Cac yeu to cua bai bao tac dpng tfen chi so trich dan Liftfng Oinh Hdi Vi^n Khoa hpc Giao due Vi^ Nam 101 Trln HJng Oao, Hoan Kiem, Ha Ngi, Viet Nam Email; luQngdinhhai@vnies,edL TOM TAT: Chl sd trich dan the hien sd lan bii bao dugc trich dan d cic nghien cdu khic, la mgt chi so dinh gia chat lugng nghien cdu khoa hgc Nhieu yeu td cda tap chf, tic gii va bii bio cd tic dgng den chi sd trich dan Bii viet tap trung de cap den mdt so yeu to cua bii bio la tieu de, tdm tat, td khoa bing bieu, phy luc vi tii lidu tham khao, dd mo ti cic dac diem lim tang hoae giim sd luong trich dan Dda vao ket qua nghien cdu dinh luong, cic khuyen nghi duoc de xua't vdi tdng yeu to: Tieu de viet cd dgng, dung cu phip, md ti chu de nghien cdu, trinh md ti chi tiet ket qui nghien cdu vi ban che sd dung cic td lim giam ning tim thay bii bio Tdm tat dim bio cau true, cung cap day du thdng tin chinh cua nghien cdu, cd the sd dung dgc lap vdi bai bio TU khda nen tham khao danh muc ma cac tap chf, cO sd dd lieu phan loai theo cic lmh vUc, chu de cd lien quan den ngi dung nghien Bing, biSu vi phu luc dugc khuyen khich sd dung nham tao sU than thien vdi ddc gii Til lieu tham khio can cin nhae mdc uy tin cua tic gii cung nhu so lUOng tai lieu trich dan de tang tfnh khoa hgc cija bai bao Viec quan tim nhieu hOn dSn viet tieu de, tdm tat, lUa chgn tUkhda, hinh thde trinh bay vi tii lieu tham khio giup bii bao dd ding tiep can ddc gia hdn, td dd cd the dat duac chi sd trich dan cao hdn Tif KHOA: Chl so trich dan; phan tich trich dan; dac diem tricti dan; chi so chat IUdng bai hao; y ^ u t d tac dgng -^ Ntian bSi 26/8/2019 • * Nlian ket qua phan bien va chinh SLia 15/9/2019 -^ Djyet dang 25/10/2019, Dat van de Chi so trich dan Eugene Gafield [1] de xuat, the hien so lan bai bao dirge cac nghien ciru khac trich dan, la mpt chi so phan anh chat lircmg cung nhu tac dgng ciia bai bao den linh virc nghien ciju Hien nay, chi so dugc coi la mot chi so danh gia chat lugng nghien ciju khoa hoc [2] Theo Garfield E [3], khoang 20% so lirgng bai bao chiem htm 80% tong so lugng trich dan, phan lan bai bao lai khong dirge trich dan lan nao hoae it dugc trich dan Dira vao chi so trich dan co the danh gia rang bai bao khong hoae it trich dan co chat lugng thap hem bai bao nhieu trich dan [4], bai bao co so lirgng trich dan cao hem thi bai bao CO ehat lugng tot hem [5] Vai mong muon bien ket qua nghien ciru tai cgng d6ng khoa hgc, cac tac gia thucmg xuat ban cr nhirng tap chi co uy tin, co dong dao lugng dgc gia, nham tang ehi so trich dan cua bai bao Van de danh gia tac dong cua bai bao boi chi so trich dan dugc nghien ciiu theo each tiep can mo hinh can true va each danh gia mgt/mgt vai ygu t6 rieng re Mo hinh nghien ciju CO cau tnic ba nhom: Tap chi, tac gia va bai bao [4], Ket qua ehung eho biet miic uy tin ciia tap chi la yeu to tac dgng nhieu nhat den chi so trich dan cua bai bao [6] O nhom tac gia, co hai yeu to co anh huong la mirc uy tin cua Jac gia va s6 lugng tae gia Tac gia co uy tin ban linh virc nghien ciiu co miic tac dgng lan hem, tham chi doi voi ca linh virc nghien ciiu khong phai la the manh [4] Bai bao it tac gia co miic tac dgng eao hem so vai bai bao nhieu tac gia hoae chi co mgt tac gia nhat [7], nhom bai bao, theo Roche va cgng sir [4], eo cac yeu to co anh hircmg d6n chi so trich din nhu sau: Linh vuc nghien ciiu, mgt so ITnh virc nghien eiiu co xu huang it dugc trieh dan han, nhu la kinh te so hoae la phat trien phan mem; Bai bao tong quan co miic tac dgng thap hem so voi bai bao dinh tinh (xem Bang 1) Ngoai cac yen to thugc mo hinh cau true tren, cac yeu to khae dugc nghien ciiu kha da dang, du cac yeu to chua sap xep CO tinh he thong Bai bao sir dung phuang phap nghien ciiu phiic tap hon co so lirgng trich dan eao hon [8] Bai bao trinh bay kk qua nghien eiiu a phu luc co chi so trieh dan cao hon so voi bai bao khong eo phu luc trinh bay ket qua nghien ciiu [9] Bai bao duge tai trg co chi so trich dan cao hon so vai bai bao khong co tai trg [10] Cae yeu to khac co th^ kk dSn la miic quan tam cua van de nghien ciiu, van de nghien ciiu mai, danh mue tai lieu tham khao, tieu de, dai bai bao, thoi gian xuat ban, tu trieh dan, ngon ngir Bai vi§t tap trung trinh bay cac dae diem eiia mgt so ygu t6 ca ban thugc nhom bai bao eo tac dgng den chi so trieh dan da dugc nghien ciiu dinh lugng Do la tieu de, torn tat, tir khoa, bang bieu, phu lue va tai lieu tham khao Ngi dung bai viet co thi dugc xem la mgt nguon tham khao de vigt tigu dl, torn tat, lua chgn tu khoa, hinh thirc trinh bay va tai lieu tham khao huong den viec tang tinh tuang tac nhigu han vai dgc gia N6i dung nghien ci7u 2.1 Tieu ffe bai bao Theo nhu cku tim kilm, dgc gia thuang dgc luot rat nhigu tieu de nhung chi tham khao ngi dung mgt s6 bai Do do, vigt tieu de tao su chii y la vkn dk quan trgng khong the bo So 22 thang 10/2019 29 NGHliN CtfU Lf LUAN Bang : M o hlnh cau true ba nhom danh gia tac dong (Fen chi s o t n c h dan Chat li/dng tap chi Ti le trich dan Kha nang truy cap Kh^ nang tim th^y Pham vi phSt hanh So luang tac gia Qu6c tjeh Giai tinh Do tuoi Tac gia chinh thuoc vien nghien cflu Jhil hang cua vien nghien cifu Mflc uy tin Ti le tfl trich dan Dia vi xa hoi Danh sach da xuat btin Nam xueit ban V i t r i muc luc Van de nghien cflu LTnh vUc nghien ciJu Pham vi nghien ciiU Phuang thflc nghien cflu Do d^i tieu de So lUflng tif kh6a Ngon ngO So trang Danh sach du^ic trich dan So IflOng tai lieu tham khao dai bai bSo Co/khong co tai trfl qua, Truiic tien, tieu de can dat du ba muc tieu: Gioi thieu van de hoae ITnh virc nghien ciiu; Tao dugc su to mo dg dgc gia tim hieu them phan tom tat va ngi dung; Chiia tir khoa giup tim thong tin dg dang hem Tigp theo la lira chgn kieu tieu de phu hgp ngi dung bai bao Ve ca ban, co ba kigu tigu dg: Tigu dg khai bao, tigu demo tava tigudg eau hoi [11], Tigude khai bao cungcSp thong tin nghien eiiu chinh ciia bai bao, phii hgp vdi nghign eim hgc thuat nhung it kha thi dg viet tigu de bai bao khoa hgc Tigu dg mo ta chi eung cap thong tin Iinh vuc, ngi dung Clia bai bao ma khong dg cap de kgt qua nghign ciiu Day la dang tigu de dugc sir dung bien hien Tieu de cau hoi cung cap chii de nghign cuna duai dang cau hoi de thu hiit su to mo cua dgc gia Theo Gustavii, B [12], kigu tigu de phii hgp voi cac bai bao eo tinh chat trao doi, thao luan, neu y kien ca nhan, Jamali HR [11] da thu thap thong tin ciia 2.172 bai bao xuat ban nam 2007 tir he thong ca sa du lieu Scopus de tim hieu moi quan he giiia cac kieu tieu de va chi so trich dan Kgt qua cho thay eo su khac biet CO y nghla thong ke So lugng trich dan bai bao c6 tigu de khai bao, tieu de mo ta, tigu dg cau hoi lan lugt la 12, 14, Bai bao co tigu de mo ta co so lugng trieh dan cao nhat va bai bao eo tieu de cau hoi co so lugng trich dan thap nhat Mpt yeu to khac can xem xet la dai ciia tieu dg Tieu dg CO dai qua ngan hoae qua dai thi bai bao deu co chi so trich dan thap So lugng ki tu trung binh ciia tieu de hien la 70 va khong qua 140 ki tu [13] Tigu dg qua ngan the hien ngi dung tong quat, tieu de qua dai lai thg hien ngi dung chi tigt, do chua tao dugc su to mo ciia dgc gia doi vo'i bai bao, Cac thong tin dac thii nhu ten nuae, ten dia danh, thuat ngir ca ban ngn han chg dua vao tieu de Tolga Yuret tinh hieu sukt ciia cac tir/cum tir tieu de, tom tat, tir khoa hon 3.000 bai bao thugc ca so dir lieu Web of Science dugc xuSt ban tir nam 2010 den 2012 va chi rang tieu de eo cac tix tren thi bai bao co chi so trich dan thap hon Mgt so tir dugc liet ke la teachmg, some, Korea, education, equations, report, Co thg thong tin dac thii lam han chg kha nang tiep can cua dgc gia doi vai bai bao Ben canh do, can ban ehg vigt tieu dg phu nh^m tranh tang dai tigu de, tang thong tin chi tigt nghign eim, tir lam giam su chii y ciia dgc gia [14], Trong tnrang hgp ckn co tieu d^ phu dam bao cac yeu cau nhu tieu de chinh Qk tranh cho dgc gia higu khong chmh xae y tuong ciia bai bao, tac gia ckn chii y dgn trat tu tir/cii phap tigu dg Co hai kiSu 16i cii phap thuang gap d tieu dg la ve mat khoa hgc va mat ngon ngu Singh S va Suvlrya S [15] phan tich tigu dg cua 50 bai bao va thSy ring chi co 10% bai bao la khong co 16i vg mat khoa hgc va mat ngon ngii, 90% bai bao lai co 55 I6i ve mat khoa hgc va 30 loi vg mat ngon ngu Tieu dl can dam bao dung cu phap de tmyen tai thong tin mgt each ehinh xae, truang hgp khong chac ehan tac gia ngn tim su ho trg cua nguoi ban dja hoae nguai thao ngon ngu Nhu vay, dg c6 m6t tigu de bai bao thu hiit dOc gia can dugc viet CO dgng, diing cii phap, phan anh dung muc tigu nghien ciiu, tranh mo ta van de nghign ciru qua rgng hoae qua hep, tranh sir dung cac ygu t6 khong can thigt, ngn dugc vigt cu6i eimg sau hoan tkt ca cac muc eua bai bao Tieu d£ khong phai la tat ca nhung ch5e chdn la yh t6 dau tien de tao an tugng vai dgc gia, tir lam tang kha nang su chii y dgn ngi dung ciia bai bao 2.2 Tom tat bai bao Tom tat cung ckp thong tin ng§n ggn ciia bai bao, chiia t6i da 400 tir, va dugc khuygn nghi khoang 200 din 250 til [15] Tom tdt thuong dugc cau triic cac phiin thong tin khac nhau, giiip ban dgc de dang lya chgn thong tin co gia tri dg tham khao Cac phdn g6m b6i canh hoae gioi thieu van dg, doi tugng hoae muc tieu, phuang phip thirc hien, kgt qua nghien euu va kgt luan [16] B6i canh hoae gioi thieu vkn dk, va doi tugng hoae muc tigu thudng la phan ng5n rihit, tom ggn mgt hoae hai cau, Phuong phap thuc hien chigm ti le 30 - 35% dai torn tit, cung ckp thong tin qua trinh thuc hien nghien ciiu nhu la chon mlu kl thuat phong vSn Ket qua righien ciru 1^ phdn dai nhdt' chigm ti le 35-40%, cung cap ket qua nghign ciru chinh dua tren phan tich s6 lieu (ngu co) Ket luan c4n vigi ^dt each ngdn ggn, chinh xae dua tren kgt qua nghien ciiu Thong tin torn tdt nghien cuu dam bao cac li~ edu triic co chinh xae cao han thong tin toan " ^ K^" bao Weber va cgng sir [17] su dung tri tue nhan T^" • 111 iao giai 30 TAP CHi KHOA HQC GIAO DUC VIET NAM LUdng Dinh HSi thich (Explainable Artifical Intelligence) so sanh ehinh xae thong tin tdm tat va thdng tin toan van cua 110 bai bao Kgt qua cho thay chinh xae trung binh cua thdng lin torn tdt cao hon chinh xae trung binh cua thdng tin toan van, sir khac biet ed y nghTa thdng kg Cd the thay chat lirang thong tin tdm tat the hien tdt han chat lugng thdng tin toan van Hai ygu td tac dgng dgn chi sd trich dan can quan tam la dp dai cua tom tdt va tir thudng dugc sir dung tdm tdt Letchford va cgng sir [18] thu thap thdng tin ciia 216.280 bai bao tir ca sd du lieu Web of Science duge xuat ban tir nam 1999 dgn 2008 de tim higu mdi quan he giira hai ygu to tren vdi sd lugng trich dan Ket qua cho thay cd mdi lien he giira dai tdm tat voi so lugng trich dan, tom tat ngan hon thi bai bao co chi sd trich dan cao hem, phan tich co y nghia thflng kg tren mau tdng the va mau theo timg nam Ben canh do, nghien cim cung chi rang tdm tat chira nhigu tir thirong dugc sir dung co sd lugng trieh dan cao hon Trai vdi khuyen cao han che sir dung thuat ngu eo ban, thuat ngii ki thuat dugc khuyen nghi dg lam tang chi so trich din Baba, Baba va Ikeda [19] sic dung du lieu eiia Proceedings of the National Academy of Sciences dugc xuat ban tir nam 1981 dgn 2003 dg tim higu mdi lign he giira thdng tin torn l^t va chi sd trich dan Nhu vay, torn tat ciia bai bao cd chi so trieh dan cao thirong la mgt phien ban thu nhd ciia bai bao, dam bao tong quan day du thdng tin ehinh, va co thg sir dung dgc lap, khong tham chigu den bat ki phan nao bai 2.3 Til khoa bai b^o Tir khoa la tir hoae cum fir mo ta dac trung cua bai bao, cd thg la chu dg, khai niem, md hinh li thuygt Viec phan loai, danh chi rauc eua tap ehi, ca sd dii" lieu, bd may tim kigm deu su dung tir khoa, dd, viec lua chgn tii khoa chinh xae se giiip kgt qua nghign ciru dugc phd bien rdng rai hem Uddin va Khan [20] t6ng hgp thdng tin 28.373 bai bao tieng Anh tir ca sd dir lieu Scopus dugc xuat ban tir nam 1998 den nam 2012 dg nghign ciru tac dgng ciia tir khda den chi so trich dSn bai bao, ket qua cho thay cd ba ygu td CO moi tucmg quan duong va mdt ygu to cd tuong quan am Thir nhat la ttnh da dang cua tir khda, co tuong quan duong voi chi so trich dan Tinh da dang dugc the hien tir khda Clia bai bao dugc tap chi hoae co sd dir lieu phan loai d cac nhom, chii de hoae ITnh vue nghien ciru khac Tir khoa cang da dang thi bai bao co sd lugng trich dan cang cao Thir hai la tinh tang trudng cita tir khoa, cd tuong quan dirong vdi chi so trich dan.Tinh tang trudng the hien miie tang hoae giam so lugng sir dung tir khda theo timg giai doan Tir khoa co xu hudng tang thi bai bao co xu hudng dat hich dan cao hon Ngugc lai, tir khoa co xu hudng giam thi bai bao cd xu hudng trich dan it hon Thii ba la so lugng tii khoa, cd tuong quan duang vdi ehi so Mch dan Thong thudng, cae tap chi quy dinh sd lugng tir dgn 10 til khda 86 tugng tir khoa cang nhieu thi bai bao CO so lugng trich dSn cang cao Cuoi ciing la ti le tir khoa mdi, co tuang quan am vdi chi s6 trich dan Tir khda mdi la tir khoa chua dugc sir dung bao gid, CO thg la khai niem mdi, md hinh mdi, phuang phap nghign ciru mdi Ti le tir khoa mdi eang eao thi bai bao ed sd lugng trich dan cang it 2.4 Bang, b i l u va phu luc Bang, bigu do, phu luc la cac hinh thire truyin tai thdng tin mgt each true quan va hieu qua nhat den ddc gia Viec sir dung bang va bieu trinh bay kgt qua nghign ciru la than thien ban viec sir dung so lieu va van ban Miettunen va Nieminen [21] phan tieh 448 bai bao thuge b6n tap chi lmh vue tam than hgc (The American Joumal of Psychiatry, Archives of General Psychiatry, British Joumal of Psychiatry va Nordic Joumal of Psychiatry, ian lugt cd ehi sd Impact Factors nam 2001 la 11.981, 6.913, 4.143 va 0.547) da tim hieu moi lign he giiia cac dac diem cua bai bao vdi chi sd trich dan Ket qua cho thay, bai bao co sir dung bang va bigu dd cd chi so trieh dan cao han so vdi bai bao khdng co bang va bigu Bgn canh dd, sd lugng bang va bieu dd bai bao eiing ed tac dgng den sd lugng trich dan Nieri va edng su [22] phan tich 114 bai bao tir co sd dir lieu PubMed dugc xuat ban tir nam 1991 dgn nam 2000 cho thay co moi lien he giiia so lugng bang, bieu vdi ehi so trich dan Bai bao CO nhieu bang, bieu hon thi ed sd lugng trich dan nhigu han Bang va bigu chua dugc nhieu thong tin hon s6 lieu dan thuan nen sd lugng cang nhigu thi dgc gia cang dg dang tiep nhan ket qua nghign cim.Trong cac dang bieu do, Miettunen and Nieminen [21] khuygn cao ngn sii dung bigu dd box plots hoae dot plots de tmygn tai dugc nhieu thong tin nhat Tuong tu bang va bieu do, phu lue trinh bay thong tin nghien cim cung co mSl quan he vdi chi s6 trich dan Trong nghign ciiu eua Stremersch va edng su [9] tren 659 bai bao lua chgn nglu nhien thugc tap chi marketing (International Joumal of Research in Marketing, Joumal of Consumer Research, Journal of Marketing, Joumal of Marketing Research, va Marketing Science ) dg lam sang to cac ygu td tac dgng dgn chi sd trieh dan Kgt qua cho thdy bai bao sir dung nhieu phu iuc thi chi s6 trich dan cao hon bai bao khong/ it sir dung phu lue Phu luc chiia thdng tin nghien ciiu hd trg cho ndi dung bai bao giiip ddc gia higu chinh xae hem, CO the la bg cong cu, sd lieu tho quan trgng, quy trinh thuc hien Viec sir dung cang nhieu phu lue thg hien ket qua nghign ciiu cang minh bach va dam bao tinh khoa hgc Nhu vay, viec sii dung bang, bieu va phu lue khdng chi giiip ndi dung dg hieu, than thien hem vdi dgc gia ma cdn giiip bai bao the hien tinh khoa hge nghign eim 2.5 Tai lieu tham khao Viec trieh dan tai lieu the hien miic dang tin cay eua thdng tin duge hd trg Do do, tai lieu trich din cang chdt lugng thi bai bao cang dam bao tinh khoa hgc Biscaro va Giupponi [19] tign hanh nghign ciiu 3.343 bai bao tir co sd dir lieu Web of Knowledge dugc xuat ban tir nam 1989 den 2010 va nhan thdy m6i quan he giua miic uy tin ciia tac gia vdi chi s6 trich din Viec trich din tai lieu cua tac gia cd uy tin cao han thi s6 lugng trieh din eiia bai_bao nhigu hon Bgn canh dd, sd lugng tai lieu dugc trich din ciing cd So 2Z thang 10/2019 31 NGHliN CQu L I L U A N Bang 2: Danh sach cac lii/ cum tir co tac dpng nhieu nhat den chi so trich dSn W mm uirong Tieu « graphene, batteries; sequencing; randomized; meta-analysis; genome-wide, guidelines, society; advances; systematic; 2010, W ' ' i j U j H ^ ! methylation; ptiotocataiytic; histone; genome; intiammation; alzlieimer's; recent, mammalian; high-pertomiance; arabidopsis; recomme reveals; solar; regulates; photovoltaic; targehng; topological WtumtirironnTomlat graphene; braf; battenes; reads; microbiota; autophagy; nanosheets; micromas; reprogramming; mimas; s i r t i ; person-years; l"^^ , ^ " ^ ' next-generahon; emt; progression-free, nanomaterials; rnas; plasmonic; genome-wide; pluripotent; biofuels; aacr; nr{2; non-coding; transcnp ome, self-renewal; epigenetic; functionalization Tii/ cum tit Tir khoa embryonic stem-cells; carbon nanotubes; field-effect transistors; graphite; genome-wide association; caenorhabditis-elegans; DNA methylaton; living cells, regulatoiy t-cells; gold nanoparticles; tgf-beta; one-pot synthesis; quantum dots; functionalizafcn, electrodes; acute myeloid-leukemia; long-term potentiation; activated protein-klnase, nf-kappa-b; genome; placebo-controlled trial; arabidopsls-thaliana; growth-factor receptor; synaphc plasticity, mouse model; mesenchymal stem-cells; growth-factor-beta; drug-deliveiy; human brain; innate Immunity Bang 3: Danh sach cac tir/cum t i l co tac ffpng thap nhSt tien chi s trich d i n Tir/ cum tir Tieu Ss note; theorem; graphs; Turkey; operators; genus; university; spaces; case; asymptotic; teaching; law; Brazil; Iran; bilateral; some; Mexico; existence; polihcs; integral; presenting, report, symmetnc, unusual, nursing; equations; education; Brazilian; Korean; Korea, lai cum tir Tom tat espana; boy; girl; let, angstrom{3}; banach; algebras; his; trihum, she; opt; woman; algebra; court; colonial; abeiian; replications; eyelid; (p>005); Turkish, projective; ineducible, polish, paulo; Russian; buffalo; essay, courts; man; rio Til/cum tvl Til khoa spaces, sheep; dogs; Brazil; existence; cattle; law; injuries; cultivars; steel, equations, yield; education, Turkey; constituents; trauma; geomeby; convergence; ceramics; waves; students; politics; alloys; fish, leaves; flows; Spain, gender; competition, patient moi quan he vdi so lugng trich dan ciia bai b a o Cu the la bao Tir/cum tir tieu dg, tdm tat va tir khda co miic so lugng tai lieu trich dan eang nhieu thi bai bao co ehi so tac d g n g la khae B a n g v a B a n g migu ta kgt qua trich dan eang eao [23] Do do, vigc lira chgn tai lieu trieh nghien ciiu d a n g tham khao viec sir dung tir/cum tir a dan cung nhu so iugng tai heu la quan trgng n h a m tang tinh cae muc lien quan khoa hgc ciia bai bao K i t lu^n 2.6 Mot so yeu tti khac Chi so trich dan bai bao phu thugc nhigu vao chSt lugng bai nhdm bai bao, ngoai cac yeu td trgn, co thg kg den mgt bao, uy tin cua tac gm, uy tin cua tap c h i , Tuy nhign, viec s6 yeu td khac nhu chu dg, dac digm ddi tugng nghien cuu, tang sd lugng trich d i n cung kha thi tir nhimg b u d c don gian p h u o n g p h a p nghien eim, dac digm ket qua nghien ciiru, hon, quan tam hon den vigt tieu dg, tdm tat, lua chon tir khoa, dai eiia bai bao, thdi diera xukt ban ciia tai lieu tham khao hinh thue trinh bay ndi dung, lua chon tai lieu tham khao, Ket qua nghien cuu cua Tolga Yuret [24] e h o j h i y viec lam tang kha nang tigp can dgc gm, trudc bai bao duac sir dung tir/cum tir co tac d g n g den chi so trich d i n cua bai danh gia va quyet dinh duge trich d i n hay khdng T i i li^u tham khao [1] [2] [3] [4] 32 Eugene Gafield, (1955), Citation Indexes for Science: A New Dimension in Documentation through Association of Ideas, Science, 122, 315-9 Durieux, V., & Gevenois, P A, (2010), Bibliometric indicators, quality measurements of scientific publication Radiology, 255(2), p.342-351 Garfield, E, (2006), The history and meaning of ihe journal impact factor, Joumal ofthe American IVledical Association, 295, p 90-93 Roche, M., Prester, J., Benlian, A , & Schryen, G, (2016), TAP CHi KHOA HOC GIAO DUC VIET NAM [5] ^o ^li'^il^^^^^^^^ pMicaliom in cliemstry be,icl„ T ' "^ Journal oflnformetrics, 6(11 o i l lo lualityl, joi.20ll.08.00i ' * • 1'":10-1016/j Kumar MJ Editorial Commentry (2013\ ip^ Review, 30 5, p.361-363, http.ffdx.do, oro;Vn ? " ' ' " ' ™ ' 4602.123113 '•"8'10.4103/0256- :_ 'l^fM^^ IM^M