%0 Journal Article %A A. H. Petrosyan %A I. G. Khachatryan %T About expantion by eigen functions self-adjoint differential operator's with coefficients having precise behavior in infinity %J Proceedings of the Yerevan State University. Physical and mathematical sciences %D 2004 %P 22-27 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/UZERU_2004_1_a1/ %G ru %F UZERU_2004_1_a1