Robert, Alain. <br/><br/>
Nonstandard analysis/ 
Alain Robert. 
 - New York:  John Wiley & Sons,  1985. 
 - 156 p. ;   24 cm. 
<br/><br/>p.153-154. 
<br/><br/><label>ISBN: </label>0471917036 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematical analysis, Nonstandard.