TY - JOUR AU - A. V. Dukov TI - Bifurcations of the `heart' polycycle in generic 2-parameter families JO - Trudy Moskovskogo matematičeskogo obŝestva PY - 2018 SP - 247 EP - 269 VL - 79 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MMO_2018_79_2_a4/ LA - ru ID - MMO_2018_79_2_a4 ER -