1. W. E. WALLACE: ‘Rare earth intermetallics’; 1973, New York, Academic Press.
2. Rare Earth-Transition metal permanent magnet materials
3. J. M. D. COEY: in ‘Current trends in the physics of materials 1990’; 1990, Amsterdam, North-Holland.
4. RETM5and RE2TM17permanent magnets development
5. K. J. STRNAT: in ‘Ferromagnetic materials’, Vol. 4, (ed. E. P. Wohlfarth and K. H. J. Buschow), 131; 1988, Amsterdam, North-Holland.