[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
[MathOuvrage]
Convex analysis
/ Magaril-Il'yaev, Georgii G. ; Tikhomirov, Vladimir M. ; Trad. Chibisov, Dmitry.
-Providence RI : American mathematical Society, 2003. - viii, 183 p. ; 22 cm