%0 Journal Article %A M. I. Shtogrin %T Piecewise Smooth Developable Surfaces %J Informatics and Automation %D 2008 %P 227-250 %V 263 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_2008_263_a15/ %G ru %F TRSPY_2008_263_a15