1.
BOUCHAL L, MEBARKI K, GEORGIEV SG. Nonnegative solutions for a class of fourth order singular eigenvalue problems. Stud. Univ. Babeş-Bolyai Math. [Internet]. 2024 Dec. 13 [cited 2025 Feb. 5];69(4):905–912. Available from: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/8609