1. Kojima, in: E.P. Wohlfahrt (Ed.), Ferromagnetic Materials, Vol. 3, North-Holland, Amsterdam, 1982, p. 307.
2. J. Smit, H.P.J. Wijn, Ferrites, Hexagonal ferrites, Philips Technical Library, 1959, p. 547.
3. Hysteresis of nanocrystalline R–Fe–B
4. H. Davies; Physics World, November 1994.
5. E.C. Stoner, E.P. Wohlfarth, Philos. Trans. Roy. Soc. 240A (1946–1948) 600.