Augmented down-up algebras and uniform posets. - Paul M. Terwilliger; Chalermpong Worawannotai (Ars Math. Contemp., 2013)

The nonexistence of distance-regular graphs with intersection arrays {27, 20, 10;1, 2, 18} and {36, 28, 4;1, 2, 24}. - Andries E. Brouwer; Supalak Sumalroj; Chalermpong Worawannotai (Australas. J Comb., 2016)

The Nonexistence of a Distance-Regular Graph with Intersection Array {22, 16, 5;1, 2, 20}. - Supalak Sumalroj; Chalermpong Worawannotai (Electron. J. Comb., 2016)

The nonexistence of a distance-regular graph with intersection array $ {75, 64, 22, 1; 1, 2, 64, 75 }$. - Supalak Sumalroj; Chalermpong Worawannotai (Australas. J Comb., 2022)

4-Total domination game critical graphs. - Chalermpong Worawannotai; Karnchana Charoensitthichai (Discret. Math. Algorithms Appl., 2024)