Rektorys, Karel <br/><br/>
Variational methods in mathematics, science, and engineering / 
Karel Rectorys ; translated from the Czech by Micheal Basch 
 - Boston :  D. Reidel Publishing Company,  1977 
 - 571 p. :  ill. ;  27 cm. 
<br/><br/><label>ISBN: </label>9027704880 
<br/><br/><label>LCCN: </label>74-080530 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Calculus of variations<br/>Hilbert space<br/>Differential equations--Numerical solutions<br/>Boundray value problems--Numerical solutions