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2. Gschneidner, H.A.: Rare Earth Alloys, New York: Van Nostrand 1961.
3. Savitski, E.M., Terekhova, V.F., Burov, I.V. Markova, I., Numkin, D.: Rare Earth Alloys, Academy of Sci. of the USSR, Moscow 1962.
4. Nevitt, M.V.: Electronic Structure and Alloy Chemistry of the Transition Elements (Beck, P.A., ed.), New York: John Wiley and Sons, Inc. 1963.
5. Schubert, K.: Kristallstruckturen zweikomponentiger Phasen, Berlin, Heidelberg, New York: Springer 1964