Lu, Ting, et al. “The Effect of Flow Resistance on Water Saturation Profile for Transient Two-Phase Flow in Fractal Porous Media”. Advances in Geo-Energy Research, vol. 2, no. 1, Feb. 2018, pp. 63-71, https://ager.yandypress.com/index.php/2207-9963/article/view/31.