sigma-polynomials. - Haicheng Ma; Haizhen Ren (Discret. Math., 2004)

The new methods for constructing matching-equivalence graphs. - Haicheng Ma; Haizhen Ren (Discret. Math., 2007)

The chromatic equivalence classes of the complements of graphs with the minimum real roots of their adjoint polynomials greater than -4. - Haicheng Ma; Haizhen Ren (Discret. Math., 2008)

On the spectral characterization of the union of complete multipartite graph and some isolated vertices. - Haicheng Ma; Haizhen Ren (Discret. Math., 2010)

A Note on Tricyclic Graphs with Minimum Degree Distance. - Wei Zhu; Shengbiao Hu; Haicheng Ma (Discret. Math. Algorithms Appl., 2011)

An Extension of the Chvátal-Erdős Theorem: Counting the Number of Maximum Independent Sets. - Guantao Chen; Yinkui Li; Haicheng Ma; Tingzeng Wu; Liming Xiong (Graphs Comb., 2015)

The characterization of graph by positive inertia index. - Haicheng Ma; Wenhua Yang; Xiafei Meng; Shenggang Li (Ars Comb., 2017)

Coordination in a composite green-product supply chain under different power structures. - Gaoxiang Lou; Zhixuan Lai; Haicheng Ma; Tijun Fan (Ind. Manag. Data Syst., 2020)

The Singularity of Four Kinds of Tricyclic Graphs. - Haicheng Ma; Shang Gao; Bin Zhang (Symmetry, 2022)

Optimal resilience strategy for manufacturers to deal with supply disruptions: Investment in supply stability versus dual sourcing. - Gaoxiang Lou; Yuhan Guo 007; Zhixuan Lai; Haicheng Ma; Xuechen Tu (Comput. Ind. Eng., 2024)

Supply chain green strategy considering manufacturers' financial constraints: how to manage the risk of green supply chain financing. - Zhixuan Lai; Gaoxiang Lou; Linsen Yin; Haicheng Ma; Xuechen Tu (Ann. Oper. Res., 2025)