Duality in N = 2 Susy S U ( 2 ) Yang-Mills Theory : A Pedagogical Introduction to the Work of Seiberg and Witten Adel Bilal — 1997 Recherche Coopérative sur Programme n°25
Non-Local Extensions of the Conformal Algebra : Matrix W-Algebras, Matrix KdV-Hierarchies and Non-Abelian Toda Theories Adel Bilal — 1995 Recherche Coopérative sur Programme n°25