TY - JOUR AU - P. I. Shveikin TI - Application of normal objects to the geometry of a~surface in a~projective space JO - Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara PY - 1974 SP - 157 EP - 170 VL - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/INTG_1974_6_a7/ LA - ru ID - INTG_1974_6_a7 ER -