Team, Support. “Hyperidentities in $(xx)(yy) \approx x(yx)$ Graph Algebras of Type (2,0): D. Boonchari, T. Poomsa-Ard”. Thai Journal of Mathematics 4, no. 3 (December 1, 2006): 61–73. Accessed December 22, 2024. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/69.