طارق خليل محمد. “Pressure Effect on Wetting Pattern in Layered Soil for Subsurface Point Source”. Al-Rafidain Engineering Journal (AREJ) 21, no. 2 (April 1, 2013): 52–63. Accessed October 2, 2025. https://rsprs.uomosul.edu.iq/index.php/arej/article/view/31461.