Algebra, combinatorics and logic in computer science   
ed. by J. Demetrovics 
 - Amsterdam  North-Holland  1986 
 - 451-887p. 
 - Colloquia mathematica socitatis .
<br/><br/><label>ISBN: </label>0444877584 
<br/><br/><label>Dewey Class. No.: </label>005.131  / N864.2