MODEL FOR THE ULTRASONIC ATTENUATION AND VELOCITY DEFECT DUE TO GEOMETRIC AND THERMAL KINKS UNDER THE ACTION OF A SLOWLY VARYING BIAS STRESS M. Bujard et G. GremaudJ. Phys. Colloques, 44 C9 (1983) C9-673-C9-678DOI: https://doi.org/10.1051/jphyscol:19839101