MAGNETISM AND EPR SPECTRA OF Mn +2Cu2+ FERRIMAGNETIC CHAINS O. Guillou, D. Gatteschi, C. Zanchini, R. Sessoli, O. Kahn, M. Verdaguer et Y. Pei J. Phys. Colloques, 49 C8 (1988) C8-857-C8-858 DOI: 10.1051/jphyscol:19888387