@article{SM_1991_68_1_a14,
     author = {A. Yu. Kolesov},
     title = {Duck trajectories of relaxation systems connected with violation of the normal switching conditions},
     journal = {Sbornik. Mathematics},
     pages = {291--301},
     year = {1991},
     volume = {68},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1991_68_1_a14/}
}