Ozalp, A. F., R. Polat, C. Cetinkaya, and M. H. Cetin. “Investigation of a Digital Hydraulic Valve Operated by Servo Motors”. Engineering, Technology & Applied Science Research 11, no. 6 (December 11, 2021): 7957–7963. Accessed June 30, 2024. https://etasr.com/index.php/ETASR/article/view/4598.