An Application of Hoffman Graphs for Spectral Characterizations of Graphs. - Qianqian Yang 006; Aida Abiad; Jack H. Koolen (Electron. J. Comb., 2017)

On the Integrability of Strongly Regular Graphs. - Jack H. Koolen; Masood Ur Rehman 001; Qianqian Yang 006 (Graphs Comb., 2019)

A generalization of a theorem of Hoffman. - Jack H. Koolen; Qianqian Yang 006; Jae Young Yang (J. Comb. Theory B, 2019)

Recent Progress on Graphs with Fixed Smallest Adjacency Eigenvalue: A Survey. - Jack H. Koolen; Mengyue Cao; Qianqian Yang 006 (Graphs Comb., 2021)

Bounding the intersection number c2 of a distance-regular graph with classical parameters (D,b,α,β) in terms of b. - Jack H. Koolen; Chenhui Lv; Jongyook Park; Qianqian Yang 006 (Discret. Math., 2025)