Kostin, M. O., and P. Ye. Mihalichenko. “The Smart Relay Protection System of Traction Energy Is Based on a New Criterion. 1. The Theory of Work”. Science and Transport Progress , no. 37 (June 25, 2011): 84–88. Accessed November 23, 2024. https://stp.ust.edu.ua/article/view/9470.