D. MADHUSUDHANA RAO, Y. S. A. PSEUDO INTEGRAL TERNARY SEMIGROUPS. Asian Journal of Current Engineering and Maths, [S. l.], v. 2, n. 1, 2013. Disponível em: http://innovativejournal.in/index.php/ajcem/article/view/144. Acesso em: 4 may. 2024.