TIAN, Yu, GRAEF, John R., KONG, Lingju & WANG, Min. Three solutions for second-order impulsive differential inclusions with Sturm-Liouville boundary conditions via nonsmooth critical point theory. Topological Methods in Nonlinear Analysis [online]. 1 marzec 2016, T. 47, nr 1, s. 1–18. [udostępniono 5.7.2025]. DOI 10.12775/TMNA.2015.089.