by DEMIDOVA E.V, TALALAKIN S.N, MATSKEVICH S.L, GEGENAVA G.V
Year of Publication 30.06.1993

by Gegenava G.V, Talalakin S.N, Vasil'eva E.P, Shadrin A.D, Spirin G.M, Demidova E.V
Year of Publication 10.08.1996