Vertex-distinguishing proper arc colorings of digraphs. - Hao Li 002; Yandong Bai; Weihua He; Qiang Sun 004 (Discret. Appl. Math., 2016)

A contribution to the theory of (signed) graph homomorphism bound and Hamiltonicity. (Une contribution à la théorie des graphes (signés) borne d'homomorphisme et hamiltonicité). - Qiang Sun 004 (2016)

Longest cycles in 4-connected graphs. - Junqing Cai; Hao Li 002; Qiang Sun 004 (Discret. Math., 2017)

Locating any two vertices on Hamiltonian cycles in large graphs. - Weihua He; Hao Li 002; Qiang Sun 004 (Discret. Math., 2020)