%0 Journal Article %A A. Sh. Shukurov %T On a paper by Khmyleva and Bukhtina %J Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika %D 2015 %P 56-59 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/VTGU_2015_6_a6/ %G ru %F VTGU_2015_6_a6