Kostrauskas, P., A. Kalvaitis, and L. Andriušienė. “The Feature of Regulating and V-Characteristics of Synchronous Electrical Machines”. Elektronika Ir Elektrotechnika, vol. 60, no. 4, Apr. 2005, pp. 46-46, https://eejournal.ktu.lt/index.php/elt/article/view/10419.