The existence and uniqueness of solution of Duffing equations with non- C 2 perturbation functional at nonresonance. Zhou, Ting; Huang, Wenhua — 2008 Boundary Value Problems [electronic only]
The solution of two-point boundary value problem of a class of Duffing-type systems with non- C 1 perturbation term. Zhengxian, Jiang; Wenhua, Huang — 2009 Boundary Value Problems [electronic only]