Plaksin, S. V., and I. I. Sokolovskij. “Magnetic Field Meters Based on Autogenerator Principles for Magnetic Levitation Transport”. Technology and Design in Electronic Equipment, no. 5, Oct. 2004, pp. 23-29, https://www.tkea.com.ua/index.php/journal/article/view/TKEA2004.5.23.