JournalsaihpcVol. 3, No. 2Volume 3, No. 2 (1986) Annales de l'Institut Henri Poincaré Cpp. 77–109Minimax principles for lower semicontinuous functions and applications to nonlinear boundary value problemsAndrzej SzulkinDOI 10.1016/S0294-1449(16)30389-4pp. 111–183Smooth invariant curves of singularities of vector fields on R3Patrick BonckaertDOI 10.1016/S0294-1449(16)30388-2
pp. 77–109Minimax principles for lower semicontinuous functions and applications to nonlinear boundary value problemsAndrzej SzulkinDOI 10.1016/S0294-1449(16)30389-4
pp. 111–183Smooth invariant curves of singularities of vector fields on R3Patrick BonckaertDOI 10.1016/S0294-1449(16)30388-2
