Christofides, Nicos <br/><br/>
Combinatorial optimization 
/ by Nicos Christofides 
 - Chichester:  John Wiley & Sons,  1979. 
 - 425p. 
<br/><br/><label>ISBN: </label>0471997498 
<br/><br/><label>Dewey Class. No.: </label>511.6  / CHR/C