Hardy-Littlewood method 
Vaughan, R. C. 
 - 2nd ed. 
 - Cambridge ; | New York :  Cambridge University Press,  1997 
 - vii, 232 p. ;  24 cm. 
 - Cambridge tracts in mathematics ;  125 .
<br/><br/><label>ISBN: </label>0521573475 (hardback)