Bere I. A NEW PERMEABILITY FOR PERMANENT MAGNETS AND ANOTHER THEOREM OF REFRACTION IN ISOTROPIC MATERIALS WITH PERMANENT MAGNETIZATION. Period. Polytech. Elec. Eng. [Internet]. 2001 Jan. 1 [cited 2024 May 1];45(1):3-12. Available from: https://pp.bme.hu/ee/article/view/972