by Zhmud, V A, Kondratiev, N O, Kuznetsov, K A, Trubin, V G, Dimitrov, L V
Published in Journal of physics. Conference series (01.05.2018)

by Lubomir, V. D., Zhmud, V. A., Ivoilov, A. Y., Trubin, V. G.
Published in Naucnyj zurnal Kubanskogo gosudarstvennogo agrarnogo universiteta (30.09.2016)

by Trubin, V. G.
Published in Siberian mathematical journal (01.03.1973)