@article{AA_2000_12_6_a2,
     author = {M. Sh. Birman and T. A. Suslina and R. G. Shterenberg},
     title = {Absolute continuity of the two-dimensional {Schr\"odinger} operator with delta potential concentrated on a periodic system of curves},
     journal = {Algebra i analiz},
     pages = {140--177},
     publisher = {mathdoc},
     volume = {12},
     number = {6},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2000_12_6_a2/}
}