MR2332081 Li-jun PAN, Gen-qiang WANG and Sui Sun CHENG Li-jun PAN, Gen-qiang WANG and Sui Sun CHENG Oscillation of Even Order Nonlinear Differential Equations with Impulses Funkcialaj Ekvacioj. Serio Internacia 50 2007 117--131 http://fe.math.kobe-u.ac.jp/FE/FullPapers/50-1/50_117.pdf http://www.ams.org/mathscinet-getitem?mr=MR2332081 In this paper, we study the oscillatory behavior of an even order differential equation with impulses. Oscillation critera are established. In addition, examples show that impulses play an important role in the oscillations of the solutions. Oscillation, Even order differential equation, Impulse. 34K10, 34C25. 50-117 2007 Oscillation of Even Order Nonlinear Differential Equations with Impulses Li-jun PAN, Gen-qiang WANG and Sui Sun CHENG Li-jun PAN, Gen-qiang WANG and Sui Sun CHENG 1 Lakshmikantham, V.; Bainov, D. D.; Simeonov, P. S. Theory of Impulsive Differential Equations World Scientific, Singapore 1989 MR1082551
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