Andreescu, Titu. <br/><br/>
104 Number Theory Problems  From the Training of the USA IMO Team /  [electronic resource] : 
by Titu Andreescu, Dorin Andrica, Zuming Feng. 
 - Boston, MA :  Birkhauser Boston,  2007. 
 - xii, 204 p. :  ill., digital ;  24 cm. 
<br/><br/><label>ISBN: </label>9780817645618 (electronic bk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Number theory--Problems, exercises, etc.