@article{SM_1979_35_6_a1,
     author = {E. F. Mishchenko},
     title = {The asymptotics of relaxation oscillations},
     journal = {Sbornik. Mathematics},
     pages = {787--793},
     year = {1979},
     volume = {35},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1979_35_6_a1/}
}