NASIF ABBAS, Mohammed. Modeling of Porosity Equation for Water Flow Through Packed Bed of Monosize Spherical Packing. Journal of Engineering and Sustainable Development, Baghdad, Iraq, v. 15, n. 4, p. 205–226, 2011. Disponível em: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1320.. Acesso em: 4 jun. 2026.