Chang, X. and Li, Y. (2010) “Existence and multiplicity of nontrivial solutions for semilinear elliptic Dirichlet problems across resonance”, Topological Methods in Nonlinear Analysis, 36(2), pp. 285–310. Available at: https://apcz.umk.pl/TMNA/article/view/TMNA.2010.037 (Accessed: 22 July 2024).