@article{ZNSL_2003_300_a21,
     author = {I. Yu. Popov and S. V. Frolov},
     title = {Violation of symmetry in the system of three laterally coupled quantum waveguides and resonance asymptotics},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {221--227},
     publisher = {mathdoc},
     volume = {300},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2003_300_a21/}
}