ESR MODES IN HEXAGONAL ABX3-TYPE ANTIFERROMAGNETS H. Tanaka, S. Teraoka, E. Kakehashi, K. Iio et K. Nagata J. Phys. Colloques, 49 C8 (1988) C8-1491-C8-1492 DOI: 10.1051/jphyscol:19888686