北京大学数学学院

(with Zhi Lv) Manifolds Associated with $(Z2)^{n+1}$ Colored Regular Graphs, Forum Mathematicum, 2012, 24(1): 121-149

The Compressibility of Checkboard Surfaces of Link Diagrams, 数学学报（英文版），2007, 23(10): 1845-1858

Maximum order of finite abelian subgroups in the outer automorphism group of a rank n free group. J. Algebra 236(1), pp 355--370, 2001

可定向曲面间覆叠映射的构造。中国科学（A辑）30(5), pp 426--431, 2000. 英文版为：Construction of covering maps between orientable surfaces. Sci. China Ser. A 43(6), pp 616--622, 2000

Maximum order of periodic outer automorphisms of a free group. J. Algebra 224(2), pp 437--453, 2000

单李群齐性空间中的相交理论。北京大学学报（自然科学版）35(3), pp 297--301, 1999