TY - JOUR AU - A. Yu. Duplishcheva TI - About Conditions of Invertibility of Difference Operators of the Second Order JO - Sibirskij žurnal čistoj i prikladnoj matematiki PY - 2014 SP - 44 EP - 49 VL - 14 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VNGU_2014_14_4_a4/ LA - ru ID - VNGU_2014_14_4_a4 ER -