Aizicovici, S., Papageorgiou, N. S. and Staicu, V. (2009) “On a $p$-superlinear Neumann $p$-Laplacian equation”, Topological Methods in Nonlinear Analysis, 36(1), pp. 111–130. Available at: https://apcz.umk.pl/TMNA/article/view/TMNA.2009.032 (Accessed: 24 April 2024).