%0 Journal Article %A A. V. Pogorelov %T Homeomorphism of convex surfaces preserving the turning variations of curves %J Doklady Akademii Nauk %D 1970 %P 25-26 %V 191 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1970_191_1_a5/ %G ru %F DAN_1970_191_1_a5