@article{DE_2001_37_4_a14,
     author = {Yu. A. Konyaev},
     title = {A {Class} of {Singularly} {Perturbed} {Boundary} {Value} {Problems} with {Unstable} {Spectrum} of the {Limit} {Operator}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {558--561},
     publisher = {mathdoc},
     volume = {37},
     number = {4},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2001_37_4_a14/}
}