MÖSSBAUER STUDY OF THE FREQUENCY DEPENDENCE OF PARAMAGNETIC RELAXATION OF DY MOMENTS IN TYPE I SUPERCONDUCTOR THORIUM W. Wagner, G. M. Kalvius et V. D. GorobchenkoJ. Phys. Colloques, 41 C1 (1980) C1-243-C1-244DOI: https://doi.org/10.1051/jphyscol:1980181