TY - JOUR AU - A. M. Stakhy TI - The returnability of points and regions in partially ordered dynamical systems JO - Differencialʹnye uravneniâ PY - 1968 SP - 693 EP - 701 VL - 4 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1968_4_4_a13/ LA - ru ID - DE_1968_4_4_a13 ER -