THE CHANGE OF THE CONNECTIV1TY OF Bi ELECTRON FERMI SURFACE UNDER PRESSURE N.B. Brandt, V.V. Moshalkov et S.M. Chudinov J. Phys. Colloques, 39 C6 (1978) C6-1106-C6-1107 DOI: 10.1051/jphyscol:19786490