M.S. Khidr, K., خضر, H. Sh. Mustafa, and حکمت. “Vertical Flow in Viscous Thin Films”. AL-Rafidain Journal of Computer Sciences and Mathematics, vol. 5, no. 1, June 2025, pp. 33-41, https://rjps.uomosul.edu.iq/index.php/csmj/article/view/20066.