TY - JOUR AU - L. A. Cherkas AU - A. A. Grin' TI - Algebraic Aspects of Finding a Dulac Function for Polynomial Autonomous Systems on the Plane JO - Differencialʹnye uravneniâ PY - 2001 SP - 384 EP - 390 VL - 37 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_2001_37_3_a8/ LA - ru ID - DE_2001_37_3_a8 ER -