... NONOSCILLATION THEOREMS FOR A CLASS OF EVEN-ORDER QUASILINEAR FUNCTIONAL DIFFERENTIAL EQUATIONSJELENA MANOJLOVI´C AND TOMOYUKI TANIGAWAReceived 13 November 2005; Accepted 30 January 2006We are concerned ... 1, 187–197.[6] T. Tanigawa, Oscillation and nonoscillation theorems for a class of fourth order quasilinear func-tional differential equations, Hiroshima Mathematical Journal 33 (2003), no. 3, ... nonoscillation theorems for a class of second order quasilinear functional- differential equations, Hiroshima Mathematical Journal 27 (1997), no. 3, 449–466.Jelena Manojlovi´c: Department of...