List of citations in Numdam for : Ljusternik-Schnirelman theory with local Palais-Smale condition and singular dynamical systems
Annales de l'I.H.P. Analyse non linéaire, Volume 8 (1991) no. 5, pp. 459-476.
Mémoires de la Société Mathématique de France,
no. 49 (1992)
, 144 p.