by LAVROVA V.G, ELCHUEVA A.D, SUKHANOV P.P, AVERKO-ANTONOVICH L.A, LIAKUMOVICH A.G, VERIZHNIKOV L.V
Year of Publication 10.05.1995

by TABACHKOV A.A, LAVROVA V.G, ELCHUEVA A.D, LIAKUMOVICH A.G
Year of Publication 10.04.1996