1.
Hungarian Mathematical Olympiad (1964-1997) : Problems and Solutions
by Leng, Fusheng, Li, Xin, Zhu...
ISBN: 9789811256363
2.
Hungarian Mathematical Olympiad (1964-1997) : Problems and Solutions
by Leng, Fusheng, Li, Xin, Zhu...
ISBN: 9789811255557