[IremOuvrage]
Le hasard
/ Ekeland, Ivar ; Lécroart, Etienne.
-Bruxelles : Le Lombard, 2016. - 71 p. ; 20 cm
ISBN 9782803637393
[MathOuvrage]
Convex analysis and variational problems
/ Ekeland, Ivar ; Temam, Roger.
-Philadelphia PA : Society for industrial and applied mathematics, 1999. - xiv, 402 p. ; 23 cm
ISBN 9780898714500