%0 Journal Article %A E. V. Bogdanova %T Free oscillations of a viscous incompressible fluid at the entrance to a pipe with an annular cross section of small curvature %J Doklady Akademii Nauk %D 1982 %P 556-560 %V 265 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1982_265_3_a11/ %G ru %F DAN_1982_265_3_a11