Dyfyniad APA

Zhang, Y. (2011). Combinatorial problems in mathematical competitions. East china normal university.

Dyfyniad Arddull Chicago

Zhang, Yao. Combinatorial Problems in Mathematical Competitions. Shanghai: East china normal university, 2011.

Dyfyniad MLA

Zhang, Yao. Combinatorial Problems in Mathematical Competitions. East china normal university, 2011.

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