TAHRI, Kamel. “Multiplicity Results for Nonhomogenous Elliptic Equation Involving the Generalized Paneitz-Branson Operator”. Studia Universitatis Babeș-Bolyai Mathematica, vol. 68, no. 4, Dec. 2023, pp. 931-4, doi:10.24193/subbmath.2023.4.19.