VIBRATIONAL SPECTROSCOPY OF MIXED STACK ORGANIC SEMICONDUCTORS: COMPARISON WITH SEGREGATED STACK SYSTEMS A. Girlando, C. Pecile et A. PainelliJ. Phys. Colloques, 44 C3 (1983) C3-1547-C3-1550DOI: https://doi.org/10.1051/jphyscol/1983060