1. I.P. Bykov, M.D. Glinchuk, V.V. Laguta, Yu. Maksimenko, L. Jastrabík, V.A. Trepakov, V. Dimza, M. Hrabovsky
    Investigation of chromium impurities charge state and chemical bounds in PLZT ceramics
    Journal of Physics and Chemistry of Solids 56 (1995) 919-923.