Far-infrared conductivity in electron-doped cuprate A. Pimenov, A. V. Pronin, A. Loidl, A. Tsukada and M. Naito Europhys. Lett., 64 2 (2003) 246-252 Published online: 01 November 2003 DOI: 10.1209/epl/i2003-00501-8