Bernard, Séverine, and Silvère P. Nuiro. “On Generalized Sobolev Algebras and Their Applications”. Topological Methods in Nonlinear Analysis 25, no. 2 (June 1, 2005): 375–390. Accessed April 18, 2024. https://apcz.umk.pl/TMNA/article/view/TMNA.2005.019.