Couchouron Jean-Franҫois, and Radu Precup. “Homotopy Method for Positive Solutions of $p$-Laplace Inclusions”. Topological Methods in Nonlinear Analysis 30, no. 1 (September 1, 2007): 157–169. Accessed April 16, 2024. https://apcz.umk.pl/TMNA/article/view/TMNA.2007.023.