%0 Journal Article %A I. S. Gutsul %T Compact three-dimensional manifolds of constant negative curvature %J Informatics and Automation %D 1980 %P 89-96 %V 152 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1980_152_a4/ %G ru %F TRSPY_1980_152_a4