%0 Journal Article %A L. P. Tepoyan %A Kalvand Daryoush %T Neumann problem for fourth order degenerate ordinary differential equations %J Proceedings of the Yerevan State University. Physical and mathematical sciences %D 2010 %P 22-26 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/UZERU_2010_1_a3/ %G en %F UZERU_2010_1_a3