@article{IM2_1990_34_2_a2,
     author = {A. M. Il'in},
     title = {On the asymptotics of the solution of a~problem with a~small parameter},
     journal = {Izvestiya. Mathematics },
     pages = {261--279},
     publisher = {mathdoc},
     volume = {34},
     number = {2},
     year = {1990},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1990_34_2_a2/}
}