J. SOBCZYK, Tadeusz. PROPERTIES OF THE CO-ENERGY FUNCTION FOR AC MACHINES WITH NON-LINEAR MAGNETIC CIRCUIT. Periodica Polytechnica Electrical Engineering, [S. l.], v. 45, n. 3-4, p. 223–233, 2001. Disponível em: https://pp.bme.hu/ee/article/view/986. Acesso em: 6 may. 2024.