4. Steven, A. E. (2010). Salient pole shoe shapes of interior permanent magnet synchronous machines. In 2010 XIX International Conference on Electrical Machines (ICEM), Rome, Italy: IEEE.
5. Deaconu, S. I., Tulelea, L., Popa, G. N., Popa, I., & Abrudean, C. (2008). Optimizing the design of a reactive homopolar synchronous machine with stator excitation. Industrial Electronics, 2008. IECON 2008. 34th Annual Conference of IEEE, Orlando, FL, USA: IEEE.10.1109/IECON.2008.4758144
6. Kutt, F., Michna, M., Kostro, G., Ronkowski, M., & Adamczyk, D. (2014). Synchronous generator model taking into account the non-uniform saturation of the pole shoes. In 2014 International Conference on Electrical Machines (ICEM), Berlin: IEEE.10.1109/ICELMACH.2014.6960195
9. Santalov, A. M., & Serebryakov, A.D. (1976). On the optimal geometry of the tooth zone of inductor machines. In Proceedings of RKIIGA (Vol. 113, pp. 12–23). Riga (in Russian).
16. Gulbis, K., & Kamolins, E. (2017). Investigation of synchronous inductor generator with electrically integrated armature and excitation windings for AC and DC power supply. In 58th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON), Riga, Latvia: IEEE.10.1109/RTUCON.2017.8124824