Encyclopaedia of mathematics / 
Managing editor, M. Hazewinkel 
 - Dordrecht :  Reidel,  1988 
 - v. ;  33 cm. 
<br/><br/> Original title: Matematicheskaia entsiklopediia 
<br/><br/><label>ISBN: </label>1556080107 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Dictionaries