An Introduction to Diophantine Equations. A Problem-Based ApproachTitu Andreescu, Dorin Andrica, Ion Cucurezeanu81,50 €
104 Number Theory Problems. From the Training of the USA IMO TeamTitu Andreescu, Dorin Andrica, Zuming FengGrand Format63,00 €
Mathematical Olympiads 1998-1999. Problems And Solutions From Around The WorldZuming Feng, Titu Andreescu34,50 €
