@article{MZM_2014_95_4_a2,
     author = {B. N. Biyarov},
     title = {On the {Spectrum} of {Well-Defined} {Restrictions} and {Extensions} for the {Laplace} {Operator}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {507--516},
     publisher = {mathdoc},
     volume = {95},
     number = {4},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2014_95_4_a2/}
}