PEIERLS INSTABILITY AND VIBRATIONAL SPECTRA OF POLYACETYLENE A.A. Ovchinnikov, A.E. Belinskii, I. A. Misurkin and I.I. Ukrainskii J. Phys. Colloques, 44 C3 (1983) C3-511 DOI: 10.1051/jphyscol:19833103