1. A good survey on the present status of intermediate valence physics is given in the recent conference proceedings: Valence Fluctuations in Solids, Falicov, L.M., Hanke, W., Maple, M.B. (eds.). Amsterdam: North Holland 1982
2. Holland-Moritz, E., Löwenhaupt, M., Schmatz, W., Wohlleben, D.K.: Phys. Rev. Lett.38, 983 (1977)
3. Löwenhaupt, M., Holland-Moritz, E.: J. Appl. Phys.50, 7456 (1979); J. Magn. Magn. Mater14, 227 (1979)
4. Holland-Moritz, E.: Thesis, Universität zu Köln, Jül-Spez-14 (1978)
5. Mattens, W.C.M., de Boer, F.R., Murani, A.P., Lander, G.H.: J. Magn. Magn. Mater15–18, 973 (1980)