Hong-Bing, Yu
Problems of number theory in mathematical competitions - East China Normal University Press, World Scientific Shangai 2010 - 106 - Mathematical olympiad series ; 00002 .
9789814271141
51 OLY
Problems of number theory in mathematical competitions - East China Normal University Press, World Scientific Shangai 2010 - 106 - Mathematical olympiad series ; 00002 .
9789814271141
51 OLY