Zuo, Liancui, Fanglan Wu, and Shaoqiang Zhang. “EQUITABLE COLORINGS OF CARTESIAN PRODUCTS OF FANS WITH BIPARTITE GRAPHS”. Italian Journal of Pure and Applied Mathematics 34 (June 30, 2015): 365–374. Accessed August 7, 2026. https://journals.uniurb.it/index.php/ijpam/article/view/6373.