@article{TM_2010_268_a17,
     author = {A. B. Vasil'eva and V. F. Butuzov and N. N. Nefedov},
     title = {Singularly perturbed problems with boundary and internal layers},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {268--283},
     publisher = {mathdoc},
     volume = {268},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2010_268_a17/}
}