Leeratanavalee, Sorasak, and Waranyu Moonta, trans. “Achromatic Numbers of $n$-Complete Starfish and $SF(n, 1)$ Graphs”. International Journal of Open Problems in Computer Science and Mathematics 18, no. 4 (September 12, 2025): 39–51. Accessed October 16, 2026. https://ijopcm.zuj.edu.jo/index.php/IJOPCM/article/view/41.