THE ULTRASOUND-INDUCED ELECTRIC FIELD GRADIENT (EFG) IN METALS B. Ströbel, K. Läuger, H.E. Bömmel and V. Müller J. Phys. Colloques, 42 C6 (1981) C6-404-C6-406 DOI: 10.1051/jphyscol:19816118