%0 Journal Article %A V. O. Manturov %T On closedness of curves with periodic curvature %J Fundamentalʹnaâ i prikladnaâ matematika %D 2000 %P 477-483 %V 6 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/FPM_2000_6_2_a8/ %G ru %F FPM_2000_6_2_a8