Lemme de Hensel pour les opérateurs différentiels Philippe Robba (1974/1975) Groupe de travail d'analyse ultramétrique
Linear second order differential equations with discontinuous coefficients in Hilbert spaces Luciano De Simon, Giovanni Torelli (1974) Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
Lyapunov stability and stability at constantly acting disturbances of an abstract differential equation of the second order Jaroslav Barták (1976) Czechoslovak Mathematical Journal