A. Petrovas, S. Lisauskas, and R. Rinkevicienė, “System for Measuring Speed of Induction Motor”, ELEKTRON ELEKTROTECH, vol. 101, no. 5, pp. 27–30, Apr. 2010, Accessed: Jan. 23, 2026. [Online]. Available: https://eejournal.ktu.lt/index.php/elt/article/view/9402