, S. Chattopadhyay, Sri Ramkrishna Sarada Vidyamahapitha. “On Right Orthodox ?- Semigroup”. International Journal on Recent Trends in Life Science and Mathematics 1, no. 5 (December 31, 2014): 01–23. Accessed September 18, 2025. https://ijlsm.org/index.php/ijlsm/article/view/20.