De Berg, M., et al <br/><br/>
Computational geometry  algorithms & applications 
M.de Berg, et al 
 - Berlin  Springer  1997 
 - xii  365 
<br/><br/><label>ISBN: </label>9783540612704 
<br/><br/><label>Dewey Class. No.: </label>11.01+8.01  / BERG