Submillimeter and infrared spectroscopy on La0.85Sr0.15MnO3A. Paolone, P. Roy, A. Pimenov, A. Loidl, A. A. Mukhin and A. M. BalbashovEur. Phys. J. B, 16 2 (2000) 245-250DOI: https://doi.org/10.1007/s100510070226