TY - JOUR AU - M. Sh. Birman AU - T. A. Suslina AU - R. G. Shterenberg TI - Absolute continuity of the two-dimensional Schr\"odinger operator with delta potential concentrated on a periodic system of curves JO - Algebra i analiz PY - 2000 SP - 140 EP - 177 VL - 12 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AA_2000_12_6_a2/ LA - ru ID - AA_2000_12_6_a2 ER -