Andreescu, Titu <br/><br/>
104 number theory problems  : from the training of the USA IMO team 
/ Titu Andreescu, Dorin Andrica, Zuming Feng 
. - Boston  : Birkhauser, 2007
. - XII-204 p.  ; 24 cm. 
<br/><br/><label>ISBN: </label>9780817645274 
<br/><br/><label>Source: </label> Achat 
<br/><br/><label>Universal Decimal Class. No.: </label>511.