J. G. Korpikiewicz, L. Bronk, T. Pakulski. “Methodology of Using Ancillary Services Provided by Distributed Generation for Planning and Development of MV Network Processes”. Acta Energetica, no. 02 (June 30, 2014): 61–65. Accessed May 18, 2024. https://www.actaenergetica.org/index.php/journal/article/view/281.