Modular functions and dirichlet series in number theory/ 
Apostol,Tom M. 
 - 2nd ed. 
 - New York:  Springer,  1990. 
 - 204 p. 
<br/><br/><label>ISBN: </label>9780387971278 
<br/><br/><label>Dewey Class. No.: </label>512.7  / APO/M