%0 Journal Article %A M. I. Shtogrin %T A flexible disk with a~handle %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2013 %P 951-953 %V 68 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_2013_68_5_a4/ %G en %F RM_2013_68_5_a4