TY - JOUR AU - R. I. Bogdanov TI - Factorization of Diffeomorphisms over Phase Portraits of Vector Fields on the Plane JO - Funkcionalʹnyj analiz i ego priloženiâ PY - 1997 SP - 67 EP - 70 VL - 31 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/FAA_1997_31_2_a6/ LA - ru ID - FAA_1997_31_2_a6 ER -