1. Rossat-Mignod, J., Burlet, P., Quézel, S., Vogt, O.: Physica 102B (1980) 237.
2. Buyers, W. J. L., Holden, T. M., Murray, A. F., Jackman, J. A., Norton P. R., du Plessis P. de V., Vogt, O., in: Valence Fluctuations in Solids, Falicov, L.M., Hanke W., Maple M.B. (eds.), Amsterdam: North Holland, 1981, p. 187.
3. Frick, B., Schoenes, J., Vogt, O.: J. Magn. Magn. Mat. 47-48 (1985) 549.