by BOBYR, A. V, FRIEZEL, V. V, GORBAN, I. S, GUBANOV, V. A, SALIEVON, G. I, SUSHKEVICH, T. N
Published in Solid state communications (01.01.1983)

by Sushkevich, T. N.
Published in Soviet Physics Journal (01.07.1971)

by Kosarev, V. M., Kostko, V. S., Ivakha, A. I., Nadtochii, V. F., Sushkevich, T. N., Chepur, S. F.
Published in Journal of applied spectroscopy (01.09.1977)