%0 Journal Article %A A. L. Verner %T A~semi-geodesic coordinate net on tubes of non-positive curvature %J Informatics and Automation %D 1965 %P 130-140 %V 76 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1965_76_a11/ %G ru %F TRSPY_1965_76_a11