ELECTRICAL TRANSPORT PERPENDICULAR TO SUPERLATTICES BUILT IN BIPOLAR AND PHOTOCONDUCTOR STRUCTURES J.F. PALMIER, H. LE PERSON, C. MINOT and A. SIBILLE J. Phys. Colloques, 48 C5 (1987) C5-443-C5-451 DOI: 10.1051/jphyscol:1987594