EPR in Mn2+ doped betaine calcium chloride dihydrate single crystals J.L. Ribeiro, J.C. Fayet, J. Emery, M. Pdzeril, J. Albers, A. Klöpperpieper, A. Almeida et M.R. Chaves J. Phys. France, 49 5 (1988) 813-817 DOI: 10.1051/jphys:01988004905081300