Zhang, Y. (2011). Combinatorial problems in mathematical competitions. East China Normal University Press.
Chicago Edition CitationZhang, Yao. Combinatorial Problems in Mathematical Competitions. China: East China Normal University Press, 2011.
MLA Edition CitationZhang, Yao. Combinatorial Problems in Mathematical Competitions. East China Normal University Press, 2011.
Warning: These citations may not always be 100% accurate.