“ Modified Equations for Water Flow through Packed Bed for Different Types of Packing Systems”. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ) 26, no. 1 (October 23, 2021): 35–54. Accessed August 12, 2026. https://jrucs.iq/index.php/JAUCS/article/view/424.