Andreescu, Titu Andrica, Dorin Feng, Zuming
104 Number theory problems: from the training of the USA IMO team - Boston Birkhauser 2007 - 204
0817645276
511(076) AND
104 Number theory problems: from the training of the USA IMO team - Boston Birkhauser 2007 - 204
0817645276
511(076) AND