@article{AA_2010_22_6_a5,
     author = {A. M. Il'in and E. F. Lelikova},
     title = {On asymptotic approximations of solutions of an equation with a~small parameter},
     journal = {Algebra i analiz},
     pages = {109--126},
     publisher = {mathdoc},
     volume = {22},
     number = {6},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2010_22_6_a5/}
}