Dubynets, L. V., R. V. Krasnov, D. V. Ustymenko, and P. M. Zatolokin. “A New Scheme for Motor Protection Compressor Trains Series ER2”. Science and Transport Progress , no. 31 (February 25, 2010): 85–88. Accessed April 29, 2024. https://stp.ust.edu.ua/article/view/13483.