Knuth, Donald E. <br/><br/>
The art of computer programming, Volume 4 :  Fascicle 4 generating all trees 
Donald E. Knuth 
 - first printing 
 - Upper Saddle River, NJ; Boston; u.a.  Addison-Wesley  2006 
 - 120 S. 
 - Newly avaible sections of the classic work .
<br/><br/><label>ISBN: </label>0321335708  19,20 
<br/><br/><label>Subjects--Index Terms: </label>Programmiertechnik