TY - JOUR AU - M. Kh. Gizatullin TI - Invariants of incomplete algebraic surfaces obtained by completions JO - Izvestiya. Mathematics PY - 1971 SP - 503 EP - 515 VL - 5 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IM2_1971_5_3_a2/ LA - en ID - IM2_1971_5_3_a2 ER -