Stable approximations of set-valued maps Jean-Pierre Aubin; Roger J. Wets — 1988 Annales de l'I.H.P. Analyse non linéaire
Convergence of convex-concave saddle functions : applications to convex programming and mechanics Dominique Azé; Hedy Attouch; Roger J.-B. Wets — 1988 Annales de l'I.H.P. Analyse non linéaire