by Adamenko, I.N., Nemchenko, K.E., Tsyganok, V.I.
Published in Journal of low temperature physics (01.07.1992)

by Adamenko, I.N., Chervanyov, A.I., Nemchenko, K.E., Tsyganok, V.I., Chagovets, V.K., Mikheev, V.A., Rudavskii, E.Ya, Sheshin, G.A.
Published in Journal of low temperature physics (01.09.1994)

by TSyganok, V.I
Published in Okhrana Gornykh Landshaftov Sibiri (1973)