"1993" . . "Quincampoix, Marc . Contribution \u00E0 l'\u00E9tude des perturbations singuli\u00E8res pour les syst\u00E8mes contr\u00F4l\u00E9s et les inclusions diff\u00E9rentielles . (Contributions to the investigation of singular perturbations for control system and differential inclusions) . ." .