Huang Y- pei, Pan Y- jong, Weng C- wen. Nonexistence of a Class of Distance-Regular Graphs. Electron. J. Combin. [Internet]. 2015Jun.3 [cited 2026Mar.29];22(2):P2.37. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v22i2p37