2-Walk-Regular Dihedrants from Group-Divisible Designs. - Zhi Qiao 003; Shao-Fei Du; Jack H. Koolen (Electron. J. Comb., 2016)

Light tails and the Hermitian dual polar graphs. - Jack H. Koolen; Zhi Qiao 003 (Des. Codes Cryptogr., 2017)

A valency bound for distance-regular graphs. - Zhi Qiao 003; Jacobus H. Koolen (J. Comb. Theory A, 2018)

Non-Bipartite Distance-Regular Graphs with a Small Smallest Eigenvalue. - Zhi Qiao 003; Yifan Jing; Jack H. Koolen (Electron. J. Comb., 2019)

On 2-walk-regular graphs with a large intersection number c2. - Zhi Qiao 003; Jongyook Park; Jack H. Koolen (Eur. J. Comb., 2019)

A new characterization of the dual polar graphs. - Zhi Qiao 003; Jacobus H. Koolen (J. Comb. Theory B, 2019)

On the Cheeger constant for distance-regular graphs. - Zhi Qiao 003; Jack H. Koolen; Greg Markowsky (J. Comb. Theory A, 2020)