VIBRATIONAL-SPECTRA OF HIGH-TC SUPERCONDUCTORS YBA2CU3OX EVIDENCE OF INTERBAND HYBRIDIZATION - Burlakov, V; Boldyrev, N; Firsov, E; Kraiskaya, K; Krasnosvobodtzev, S; Mitko, A; Pechen, E; Hadzhiysky, Y (1990)