SAENTHONG, N. Effects of size of drain valves on flow rate of the hydraulic ram pump using for agriculture. SNRU Journal of Science and Technology, [S. l.], v. 7, n. 2, p. 106–113, 2015. Disponível em: https://ph01.tci-thaijo.org/index.php/snru_journal/article/view/43662. Acesso em: 26 jan. 2022.