by Kornienko, S. M., Bykov, I. P., Glinchuk, M. D., Laguta, V. V., Belous, A. G., Yastrabik, L.
Published in Physics of the solid state (01.10.1999)

by Bykov, I. P., Brik, A. B., Bagmut, N. N., Kalinichenko, A. M., Bevz, V. V., Vereshchak, V. G., Yastrabik, L.
Published in Physics of the solid state (01.06.2009)