Courant, Richard <br/><br/>
Dirichlet's principle, conformal mapping and minimal surfaces  / 

 - New York:  Springer-Verlag,  1977 
 - xi, 332p. Bibl. Index 
<br/><br/> "It expresses the balance and tension between the individuality of mathematical objects and the generality of mathematical methods" 
<br/><br/><label>Dewey Class. No.: </label>515.9  / C858.DP