EXCHANGE INTERACTIONS BETWEEN LOCALIZED AND DELOCALIZED ELECTRONS IN SEMIMAGNETIC COMPOUNDS G. Bastard, J. A. Gaj, R. Planel et C. RigauxJ. Phys. Colloques, 41 C5 (1980) C5-247-C5-254DOI: https://doi.org/10.1051/jphyscol:1980542