Pickover, Clifford A. <br/><br/>
The mathematics of Oz :  Mental gymnastics from beyond the edge / 
By C. A. Pickover. 
 - Cambridge :  Cambridge University Press,  2002. 
 - XVI, 351 p. :  ill. ;  23 cm. 
<br/><br/>Index pp. 349-351 
<br/><br/><label>ISBN: </label>0-521-01678-9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematical recreations