Dey, Kalyan Kumar, and Akhil Chandra Paul. “Commutatively of Prime and Semiprime ?-Rings With Symmetric BI-Derivations”. GANIT: Journal of Bangladesh Mathematical Society 34 (June 28, 2016): 27–33. Accessed October 9, 2025. https://www.banglajol.info/index.php/GANIT/article/view/28551.