THE GOLDANSKII-KARYAGIN EFFECT IN Gd2M2O7 AND Eu2M2O7 COMPOUNDS E. R. BAUMINGER, A. DIAMANT, I. FELNER, I. NOWIK, A. MUSTACHI et S. OFER J. Phys. Colloques, 37 C6 (1976) C6-49-C6-52 DOI: 10.1051/jphyscol:1976611