... 8ω72ζ2+ 24p2ω62ζ22+ 4p2ω62λ3= 24 62ζ22+ 4 62+ 32p2ω52ζ32+ 24p2ω52ζ2λ 4 = 32ω52ζ32+ 24 52ζ2+ 16p2ω 4 2ζ 4 2+ 48 p2ω 4 2ζ22+ 6p2ω 4 2λ5= ... 6p2ω 4 2λ5= 16ω 4 2ζ 4 2+ 48 ω 4 2ζ22+ 6ω 4 2+ 32p2ω32ζ32+ 24p2ω32ζ2λ6= 32ω32ζ32+ 24 32ζ2+ 24p2ω22ζ22+ 4p2ω22λ7= 24 22ζ22+ 4 22+ 8p2ω2ζ2λ8= ... observers and generalized PID regulators, Nonlinear Control in the Year 2000, Lecture Notes in Control and Information Sciences, Vol. 258, pp. 367-3 84, Springer, London.Fliess, M., Lévine, J., Martin,...