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11. Singular $p$-biharmonic problems involving the Hardy-Sobolev exponent Amor Drissi, Abdeljabbar Ghanmi, Dušan Repovš, 2023, original scientific article Keywords: p-Laplacian operator, p-biharmonic equation, variational method, existence of solutions, Hardy potential, critical Hardy-Sobolev exponent, Ekeland variational principle, mountain pass geometry |