“Quasi-optimal law of angular velocity variation of the rotation of the rotor shaft of the series excitation direct-current electric motors of the tram electric drives under the invariable loading”, Вісник ВПІ, no. 2, pp. 29–33, Nov. 2010, Accessed: Nov. 15, 2026. Available: https://vpi.sprava.net/index.php/visnyk/article/view/431