@article{DAN_1990_311_6_a7,
     author = {K. I. Chernyshov},
     title = {A method for standard splitting of singularly perturbed},
     journal = {Doklady Akademii Nauk},
     pages = {1311--1316},
     publisher = {mathdoc},
     volume = {311},
     number = {6},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_311_6_a7/}
}