Kołacz, Tomasz, Krzysztof Madura, Jerzy Skwarczyński, and Dominik Zabawa. 2018. “Permanent Magnet Brushless DC Machines (PMBLDC) for General Purpose – Part II, Results of Laboratory Measurements”. Science, Technology and Innovation 3 (2):52-57. https://doi.org/10.5604/01.3001.0012.8165.