Friedman, Avner. <br/><br/>
Variational Principles and Free-Boundary Problems / 
Avner Friedman. 
 - New York :  John Wiley and Sons,  1982. 
 - IX, 710 :  il. ;  24 cm. 
 - Pure and Applied Mathematics,  0079-8185 .
 - Pure and Applied Mathematics .
<br/><br/>bibliogr. 
<br/><br/><label>ISBN: </label>0471868493 
<br/><br/><label>Uniwersalna Klasyfikacja Dziesiętna: </label> 517.9