Rucker, Rudy v. B. 1946-.
Geometry, relativity, and the fourth dimension /
Rudolf v. B. Rucker 
. - New York : Dover Publications, Inc.,  1977 
. - 133 p.  ill.  21 cm. 
<br/>К.: Бібліогр. : c. 119-133 
<br/><label>  ISBN: </label>0-486-23400-2