@article{IM2_2005_69_2_a1,
     author = {R. R. Gadyl'shin},
     title = {On the eigenvalues of a ``dumb-bell with a thin handle''},
     journal = {Izvestiya. Mathematics },
     pages = {265--329},
     publisher = {mathdoc},
     volume = {69},
     number = {2},
     year = {2005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2005_69_2_a1/}
}