E. Bartosiewicz, R. Kowalik, M. Januszewski. “Overview and Example Test Results of Modern Pilot Schemes for Coordination of Line Distance Protection Relays”. Acta Energetica, no. 01 (March 31, 2014): 4–17. Accessed September 21, 2025. https://www.actaenergetica.org/index.php/journal/article/view/263.