TY - JOUR AU - V. A. Il'in TI - An estimate for the spectral function of a selfadjoint extension in $\mathbb R^2$ of the Schr\"odinger operator with a potential satisfying the Stummel condition JO - Differencialʹnye uravneniâ PY - 1998 SP - 638 EP - 646 VL - 34 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1998_34_5_a5/ LA - ru ID - DE_1998_34_5_a5 ER -