1. Zejun Huang, Zhenhua Lyu. Extremal digraphs avoiding an orientation of C_4[J]. Discrete Mathematics. 2019,342: 1703-1717. 2.Zhenhua Lyu.0-1 matrices whose squares have bounded entries[J]. Linear Algebra and its Applications, 2020, 607: 1-8. 3.Zhenhua Lyu. Digraphs that contain at most t distinct walks of a given length with the same endpoints[J]. Journal of Combinatorial Optimization. 2021, 42:762-779. 4. Zhenhua Lyu. Extremal Digraphs Avoiding an Orientation of the Diamond[J]. Graphs and Combinatorics. 2021, 37:1373–1383. 5. Zhenhua Lyu. A Note on Extremal Digraphs Containing at Most t Walks of Length k with the Same Endpoints[J]. Graphs and Combinatorics. 2022, 38:33.
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