TY - JOUR AU - Yu. V. Masterkov AU - L. I. Rodina TI - Sufficient and Necessary Conditions for the Stable Controllability of a Nonlinear Nonstationary System on the Plane in the Critical Case JO - Differencialʹnye uravneniâ PY - 2003 SP - 227 EP - 235 VL - 39 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_2003_39_2_a8/ LA - ru ID - DE_2003_39_2_a8 ER -