@article{DE_1986_22_10_a8,
     author = {V. F. Butuzov and A. V. Nesterov},
     title = {Some singularly perturbed problems of hyperbolic type with transition layers},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1739--1744},
     publisher = {mathdoc},
     volume = {22},
     number = {10},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1986_22_10_a8/}
}