Cîrstea, F. Şt. and Rădulescu, V. D. (2000) “Multiple solutions of degenerate perturbed elliptic problems involving a subcritical Sobolev exponent”, Topological Methods in Nonlinear Analysis, 15(2), pp. 283–300. Available at: https://apcz.umk.pl/TMNA/article/view/TMNA.2000.021 (Accessed: 27 April 2024).