%0 Journal Article %A H. A. Mamikonyan %T Lyapunov function of semi-groups generated by a class of Sobolev type equations %J Proceedings of the Yerevan State University. Physical and mathematical sciences %D 2008 %P 3-9 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/UZERU_2008_3_a0/ %G ru %F UZERU_2008_3_a0