R. Nemetschek, OV. Misochko, B. Stadlober, R. Hackl: INELASTIC LIGHT-SCATTERING FROM ELECTRONIC AND PHONONIC EXCITATIONS IN NORMAL AND SUPERCONDUCTING TL2BA2CUO6 SINGLE-CRYSTALS. 1993Physical Review B: 47. ISBN 0163-1829 http://dx.doi.org/10.1103/PhysRevB.47.3450