Ivanov, A.A. <br/><br/>
Geometry of sporadic groups I  petersen and tilde geometries 

 - Cambridge  Cambridge University Press  1999 
 - xiii,408p.  23 cm H.B. 
 - Encyclopedia of mathematics and its applications .
<br/><br/><label>ISBN: </label>0521413621 
<br/><br/><label>Dewey Class. No.: </label>512.2  / IVA