@article{FPM_1995_1_1_a4,
     author = {A. B. Vasil'eva},
     title = {On the solution of singular perturbed problems having boundary layer of spike type},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {109--122},
     publisher = {mathdoc},
     volume = {1},
     number = {1},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_1995_1_1_a4/}
}