Dussel IC, Bonder JF. Existence of eigenvalues for anisotropic and fractional anisotropic problems via Ljusternik-Schnirelmann Theory. TMNA [Internet]. 2024 Sep. 25 [cited 2025 Dec. 17];64(2):577-96. Available from: https://apcz.umk.pl/TMNA/article/view/55391