PAPAGEORGIOU, Nikolaos S., VETRO, Calogero and VETRO, Francesca. Nonlinear vector Duffing inclusions with no growth restriction on the orientor field. Topological Methods in Nonlinear Analysis. Online. 13 July 2019. Vol. 54, no. 1, pp. 257 - 274. [Accessed 27 July 2024].