TY - JOUR AU - A. Artykbaev TI - Total angle about the vertex of a cone in Galilean space JO - Matematičeskie zametki PY - 1988 SP - 657 EP - 662 VL - 43 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1988_43_5_a8/ LA - ru ID - MZM_1988_43_5_a8 ER -