Peng, Fangquan. “Optimization of Drilling-Fluid Lost-Circulation Control in the Mesozoic Yanchang Formation of Zhengning Oilfield”. International Journal of Natural Resources and Environmental Studies 8, no. 3 (April 3, 2026): 78–85. Accessed July 27, 2026. https://wepub.org/index.php/IJNRES/article/view/6054.