TY - JOUR AU - I. S. Gutsul TI - Compact three-dimensional manifolds of constant negative curvature JO - Informatics and Automation PY - 1980 SP - 89 EP - 96 VL - 152 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TRSPY_1980_152_a4/ LA - ru ID - TRSPY_1980_152_a4 ER -