Xu, Fei, et al. “Displacement Mechanism of Polymeric Surfactant in Chemical Cold Flooding for Heavy Oil Based on Microscopic Visualization Experiments”. Advances in Geo-Energy Research, vol. 4, no. 1, Mar. 2020, pp. 77-85, https://astp-agr.com/index.php/2207-9963/article/view/108.