@article{MZM_2014_95_2_a4,
     author = {A. G. Eliseev and Yu. A. Konyaev and D. A. Shaposhnikova},
     title = {Unique {Solvability} of {Singularly} {Perturbed} {Boundary-Value} {Problems} with {Unstable} {Spectrum} of the {Limit} {Operator}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {222--226},
     publisher = {mathdoc},
     volume = {95},
     number = {2},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2014_95_2_a4/}
}