@article{DE_1999_35_10_a7,
     author = {A. Yu. Kolesov and N. Kh. Rozov},
     title = {``Duck hunting'' in the study of singularly perturbed boundary value problems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1356--1365},
     publisher = {mathdoc},
     volume = {35},
     number = {10},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1999_35_10_a7/}
}