RAMAN INTENSITY OF FOLDED ACOUSTIC VIBRATIONS IN SUPERLATTICES WITH COMPLEX UNIT CELL B. JUSSERAND, F. MOLLOT, M.C. JONCOUR et B. ETIENNE J. Phys. Colloques, 48 C5 (1987) C5-577-C5-580 DOI: 10.1051/jphyscol:19875125