1. Optical absorption of ferro- and antiferromagnetic europium chalcogenides
2. in: Handbook on the Physics and Chemistry of Rare Earths, Vol. I, Chap. 19, Ed. K. A. gschneideb, in the press.
3. and , Hdb. Phys., Vol. XVIII/1, Springer-Verlag, 1968 (p. 389).
4. Magnetism, Vol. 2, John Wiley, New York 1974 (p. 673).