Collatz, L. and Wetterling, W. <br/><br/>
Optimization problems   

 - New York  Springer-Verlag  1975 
 - ix, 356p. 
 - Applied Mathematical Sciences    v. 17 .
<br/><br/> "Tr. from the German by P. Wadsack".   
<br/><br/><label>Dewey Class. No.: </label>519.91  / C697.OP