%0 Journal Article %A A. G. Galumian %A H. M. Arakelian %T Mathematical comparison of two well-known patterns of material equations for gyrotropic media %J Proceedings of the Yerevan State University. Physical and mathematical sciences %D 2002 %P 35-40 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/UZERU_2002_3_a6/ %G ru %F UZERU_2002_3_a6