@article{TMF_2002_131_3_a3,
     author = {I. Yu. Popov},
     title = {Asymptotic {Series} for the {Spectrum} of the {Schr\"odinger} {Operator} for {Layers} {Coupled} {Through} {Small} {Windows}},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {407--418},
     publisher = {mathdoc},
     volume = {131},
     number = {3},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2002_131_3_a3/}
}