• E.A. Bender and Z.C. Gao, Asymptotic enumeration of labelled graphs with a given genus,
• Z.C. Gao, A formula for the bivariate map asymptotics constants in terms of the univariate map asymptotics constants.
• Z.C. Gao, B.D. McKay, R. Naserasr, and B. Stevens , On Alon-Saks-Seymour Conjecture.

• E.R. Canfield, Z.C. Gao, C. Greenhill, B.D. McKay, and R.W. Robinson, Asymptotic enumeration of correlation-immune boolean functions , Cryptogr. Commun. 2(1) (2010), 111 - 126.

· L. Dong, Z.C. Gao, D. Panario, and L.B. Richmond, Asymptotics of Smallest Component Sizes in Decomposable Combinatorial Structures of Alg-Log Type. Discrete Math and Theoretical Computer Science, 2010.

• E.A. Bender, Z.C. Gao, A. B. Olde Daalhuis, L.B. Richmond, and N.C. Wormald, Asymptotics of Some Convolutional Recurrences, The Electronic J. Combin., 17(1):R1, 2010.
• Z.C. Gao and Han Ren, Enumerative Properties of Rooted Circuit Maps, Graphs and Combinatorics, to appear.

· L. Dong, Z.C. Gao, and D. Panario, Enumeration of Decomposable Combinatorial Structures with Restricted Patterns, Annals of Combinatorics, 12 (2009), 357-372.

· Z.C. Gao, V. A. Liskovets, and N.C. Wormald, Enumeration of unrooted odd-valent regular planar maps, Annals of Combinatorics, 13 (2009), 233-259.

• E.A. Bender, Z.C. Gao, and L.B. Richmond, The map asymptotic constants t_g, The Electronic J. Combin., 15(1) (2008) R#51. (Please note that, in the published version, there are two typos in the differential equation on page 8, and the numerical value of the constant K on page 3 was not accurate.)

· Z.C. Gao and N.C. Wormald, Distribution of subgraphs of random regular graphs, Random Structure and Algorithms 32 (2008), 38 - 48.

• C. Eagle, Z.C. Gao, M. Omar, D. Panario, and B. Richmond, Distribution of the number of encryptions in revocation schemes for stateless receivers, Disc. Math. and Theoretical Computer Science, 195-206, 2008.

· L. Dong, Z.C. Gao, and D. Panario, The Size of the r-th Smallest Component in Decomposable Structures with a Restricted Pattern, Discrete Math and Theoretical Computer Science, 2007.

· P. Bose,J. Czyzowicz, Z. C. Gao, P. Morin, and D. Wood, Simultaneous diagonal flips in plane triangulations, J. Graph Theory, 54 (2007), 307-330.

· Z. Gu and Z.C. Gao, Financial Competitiveness of Macau in Comparison with Other Gaming Destinations, UNLV Gaming Research & Review Journal, (2006), Vol. 10 Issue 2, 1-12.

· Fairness of Macao Casino Games, Proceedings of the First Conference of the Asian Academic Network on Commercial Gaming, (2006),192-202.

· G. Chen, Z.C. Gao, X. Yu, and W. Zang, Approximating long cycles in graphs with bounded degrees, SIAM J. Comput., 36 (2006), 635--656.

· Z. C. Gao and D. Panario, Degree Distribution of the Greatest Common Divisor of Polynomials over Fq, Random Structure and Algorithms, 29 (2006), 26-37.

· D. Fong, Z.C. Gao, and B. Ozorio, Gambling participation among youths in Macao 2004. Report prepared for DSEJ Macao, China, 2004.

· Z.C. Gao and N.C. Wormald, Asymptotic normality determined by high moments, and submap counts of random maps. Probability Theory and Related Fields, 130 368-376, (2004).

· Z.C. Gao and J.Y. Wang, Exact Enumeration of Rooted 3-connected Triangular Maps on the Projective Plane, Applied Discrete Math. Discrete Applied Math.,141 149-159,(2004).

• Z.C. Gao and N.C. Wormald, Sharp concentration of the number of submaps in random planar triangulations, Combinatorica 23 467-486, (2003).

· Z.C. Gao and N.C. Wormald, Enumeration of rooted planar cubic maps, Annals of Combinatorics, 6 313—325, (2002).

• E.A. Bender, Z.C. Gao and N.C. Wormald, The number of labeled 2-connected planar graphs, Electronic J. Combin. 9 (2002) R#43 (13 pages).
• Z.C. Gao, I.M. Wanless and N.C. Wormald, Counting 5-connected planar triangulations, Journal of Graph Theory, 38 (2001), 18--35.
• Z.C. Gao, J. Urrutia and J.Y. Wang, Diagonal flips in rooted and labelled planar triangulations, Graphs and Combin. , 17 (2001), 647--657.
• Z.C. Gao and N.C. Wormald, The distribution of the maximum vertex degree in a random planar map, J. Combin. Theory, Ser. A , 89 (2000), 201--230.
• Z.C. Gao, B.D. Mckay and Xiaoji Wang, Asymptotic enumeration of tournaments with a given score sequence containing a specified digraph, J. Random Structures & Algorithms , 16 (2000), 47--57.

Unpublished Manuscripts.

• Z.C. Gao, Y. Xiao and J.Y. Wang, The Average Number of Non-Separating Edges in Catalan Triangulations of the Mobius Band and the Cylinder. 1999.

• Z.C. Gao_ and L. B. Richmond, and C. Thomassen, Irreducible Triangulations and Triangular Embeddings On a Surface, 1991.