Bilevel programs with extremal value function: global optimality. - Abdelmalek Aboussoror; Hicham Babahadda; Abdelatif Mansouri (Int. J. Math. Math. Sci., 2005)

Existence of solutions to weak nonlinear bilevel problems via MinSup and d.c. problems. - Abdelmalek Aboussoror; Abdelatif Mansouri (RAIRO Oper. Res., 2008)

A Fenchel-Lagrange Duality Approach for a Bilevel Programming Problem with Extremal-Value Function. - Abdelmalek Aboussoror; Samir Adly (J. Optim. Theory Appl., 2011)

An Extended Fenchel-Lagrange Duality Approach and Optimality Conditions for Strong Bilevel Programming Problems. - Abdelmalek Aboussoror; Samir Adly; F. E. Saissi (SIAM J. Optim., 2017)

New necessary and sufficient optimality conditions for strong bilevel programming problems. - Abdelmalek Aboussoror; Samir Adly (J. Glob. Optim., 2018)