Yaseen, N.M.H. and Ahmed, A.K. (2018) “Plotting the Profiles of Cartesian Surfaces by Ray-tracing”, Al-Nahrain Journal of Science, 17(2), pp. 122–127. Available at: https://mail.anjs.edu.iq/index.php/anjs/article/view/451 (Accessed: 22 May 2026).