1. Hommes, E.; Paap, G. C.: The analysis of the 3-phase squirrel-cage induction motor with space harmonics, Part 1: Equations developed by a new time — dependent transformation, Part 2: The influence of the space harmonics on the transient behaviour, Arch. Elektrotech. 67 (1984) 217–236
2. Noga, H.: Break-down analyses associated with internal asymmetry of asynchronous motors (in Polish). ZN AGH, no. 493, Cracow 1975
3. Patyk, A.: General problems of transformation of a polyharmonic model of the asynchronous machine and analyses of certain asymmetries. Acta Technica ČSAV 5 (1985) 499–523
4. Patyk, A.: A polyharmonic model of the squirrel-cage motor (in Polish), Arch. Elektrotech. 1 (1985) in print
5. Puchała, A.: The dynamic of machines and electromechanical systems (in Polish), PWN, Warszawa 1977