Koņuhova, Marina, Kārlis Ketners, Elena Ketnere, and Svetlana Kļujevska. 2009. “Investigations of the Undamped Field Effect to the Electromagnetic Processes in the Induction Machines”. Electrical, Control and Communication Engineering 25 (25): 47-50. https://doi.org/10.2478/v10144-009-0010-6.