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1. Convex analysis and variational problems. by Ekeland, Ivar Publication: Amsterdam/New York North-Holland/American Elsevier 1976 Date: 1976 Availability: Items available: School of Theoretical Physics Library [515.9 EKE] (1),
2. Minimax results of Lusternik-Schnirelman type and applications . Part 2 of the proceedings of the NATO ASI "Variational methods in nonlinear problems". Montreal , 1986. by Ekeland, Ivar Publication: Montreal Universite de Montreal 1989 Date: 1989 Availability: Items available: School of Theoretical Physics Library [519.03] (1),