Ekeland, Ivar. <br/><br/>
Convex Analysis and Variational Problems / 
Ivar Ekeland, Roger Temam. 
 - Amsterdam:  North-Holland Publ. Company,  1976. 
 - IX, 402 s. ;  24 cm. 
 - (Studies in Mathematics and its Applications)  1 .
<br/><br/>bibliogr. 
<br/><br/><label>Uniwersalna Klasyfikacja Dziesiętna: </label> 519.28/.3:517