EL AMROUSS A, ABDELLAH H, FOUAD K. Existence results for some anisotropic possible singular problems via the sub-supersolution method. Stud. Univ. Babeş-Bolyai Math. [Internet]. 2024 Dec. 13 [cited 2025 Feb. 5];69(4):849–862. Available from: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/8605