TY - JOUR AU - V. Ya. Urm TI - Necessary and sufficient conditions for the stability of a system of difference equations JO - Doklady Akademii Nauk PY - 1961 SP - 40 EP - 43 VL - 139 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1961_139_1_a9/ LA - ru ID - DAN_1961_139_1_a9 ER -