Johnson P, Krumpelman A. On the Babai and Upper Chromatic Numbers of Graphs of Diameter 2. Tamkang J. Math. [Internet]. 2021 Jan. 31 [cited 2024 Apr. 25];52(1):113-2. Available from: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/3430