Isahanov Yermek, Sarkynov Yerbol, Yakovlev Alexandr, and Zhakupova Zhanar. “Technological Scheme of a Hydraulic Ram Pumping Unit - As a Way of Using Renewable Energy Sources”. Foundations and Trends in Research, no. 5 (February 11, 2024). Accessed May 22, 2026. https://ojs.scipub.de/index.php/FTR/article/view/2948.