Rektorys, Karel. <br/><br/>
Variational methods in mathematics, science and engineering 

 - Boston :   D.Reidel Publishing Company,   1977. 
 - 571 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CALCULO DE VARIACIONES<br/>ECUACIONES DIFERENCIALES
<br/><br/><label>Universal Decimal Class. No.: </label>517.97