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Bittner, B. and Scherm, M. and Schoedl, T. and Tyroller, T. and Schwarz, Uli and Maier, Max (2002) Phonon-polariton damping by low-frequency excitations in lithium tantalate investigated by spontaneous and stimulated Raman scattering. J. Phys.: Condes. Matter 14, p. 9013.