Younis, O., F. Xu, C. Lei, J. Pallares, and F. X. Grau. “Scaling of Transient Natural Convection Cooling in Side-Cooled Cavity: The Effect of Variable Viscosity”. University of Khartoum Engineering Journal 4, no. 1 (November 2, 2022). Accessed September 1, 2025. https://uofkej.uofk.edu/index.php/uofkej/article/view/139.