Team, Support. “A Study of Generalized Clones of Rank $k$ and Generalized $k$-Hypersubstitutions: Nareupanat Lekkoksung, Prakit Jampachon”. Thai Journal of Mathematics 20, no. 1 (March 31, 2022): 405–416. Accessed May 2, 2024. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/1333.