SPECTRAL STUDIES OF THE PHASE TRANSITIONS IN MTPP(TCNQ)2 AND MEM(TCNQ)2 E. Swietlik et A. GrajaJ. Phys. Colloques, 44 C3 (1983) C3-1457-C3-1460DOI: https://doi.org/10.1051/jphyscol/1983043