BELAOUIDEL, Hassan, Anass OURRAOUI, and Najib TSOULI. “Existence and Multiplicity of Solutions to the Navier Boundary Value Problem for a Class of (p(x), q(x))-Biharmonic Systems”. Studia Universitatis Babeș-Bolyai Mathematica 65, no. 2 (June 5, 2020): 229–241. Accessed February 5, 2025. https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/2528.