Papageorgiou NS, Rădulescu VD. Multiplicity theorems for resonant and superlinear nonhomogeneous elliptic equations. TMNA [Internet]. 2016 Jul. 6 [cited 2025 Jul. 2];48(1):283-320. Available from: https://apcz.umk.pl/TMNA/article/view/TMNA.2016.048