BLOCH WALL DYNAMIC INSTABILITY AND WALL MULTIPLICATION IN AMORPHOUS RIBBONS OF METGLAS 2605 SC C. Beatrice, F. Vinai, G. Garra et P. Mazzetti J. Phys. Colloques, 49 C8 (1988) C8-1323-C8-1324 DOI: 10.1051/jphyscol:19888604