TY - JOUR AU - K. I. Dunichev TI - Stratification of two-parameter families of straight lines in a higher-dimensional projective space JO - Doklady Akademii Nauk PY - 1963 SP - 763 EP - 764 VL - 149 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1963_149_4_a1/ LA - ru ID - DAN_1963_149_4_a1 ER -