H. Ismail, Tahir, طاهر, Ibrahim O. Hamad, and إبراهیم. “A Generalized Curvature of a Generalized Envelope”. AL-Rafidain Journal of Computer Sciences and Mathematics 6, no. 2 (June 25, 2025): 39–47. Accessed August 5, 2025. https://rjps.uomosul.edu.iq/index.php/csmj/article/view/19378.