J. G. Korpikiewicz, P. Mysiak. “Classical and Solid-State Tap-Changers of HV/MV Regulating Transformers and Their Regulators”. Acta Energetica, no. 03 (September 30, 2017): 110–117. Accessed May 5, 2024. https://www.actaenergetica.org/index.php/journal/article/view/194.