Existence results for polyharmonic boundary value problems in the unit ball. Ben Othman, Sonia; Mâagli, Habib; Zribi, Malek — 2007 Abstract and Applied Analysis
On the existence of positive solutions of a nonlinear differential equation. Ben Othman, Sonia; Mâagli, Habib; Zeddini, Noureddine — 2007 International Journal of Mathematics and Mathematical Sciences