@article{SM_2006_197_4_a0,
     author = {D. I. Borisov},
     title = {Discrete spectrum of an asymmetric pair of waveguides coupled through a~window},
     journal = {Sbornik. Mathematics},
     pages = {475--504},
     year = {2006},
     volume = {197},
     number = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2006_197_4_a0/}
}