Bahrouni, A., Rădulescu, V. D., & Winkert, P. (2021). Small perturbations of Robin problems driven by the $p$-Laplacian plus a positive potential. Topological Methods in Nonlinear Analysis, 57(2), 663–673. Retrieved from https://apcz.umk.pl/TMNA/article/view/TMNA.2020.060