TY - JOUR AU - A. L. Teptin TI - On the sign of the Green's function of a linear difference boundary-value problem of second order JO - Doklady Akademii Nauk PY - 1962 SP - 1038 EP - 1039 VL - 142 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1962_142_5_a16/ LA - ru ID - DAN_1962_142_5_a16 ER -