Intensity and wavelength dependence of the photoconductivity in Cr-doped Sr0.61Ba0.39Nb2O6U. Dörfler, T. Granzow, Th. Woike, M. Wöhlecke, M. Imlau and R. PankrathEur. Phys. J. B, 38 1 (2004) 19-24DOI: https://doi.org/10.1140/epjb/e2004-00094-0