Generalized polygons  
Maldeghem, H. van. 
 - Boston, Mass. :  Birkhäuser Verlag,  1998 
 - xv, 502 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>3764358645 (hardcover : alk. paper) | 0817658645 (hardcover : alk. paper)