Kovivchak, Yaroslav     Calculation of electromagnetic processes for a turbogenerator with equivalent stator and rotor tooth zones in no-load regime [Текст] / Yaroslav Kovivchak // Computational problems of electrical engineering / Lviv Polytechnic nat. univ. ; ed.-in-chief Yuriy Bobalo. — Lviv : lviv Polytechnic nat. univ., 2012. — P. 55-63.