@article{TM_1991_197_a0,
     author = {E. F. Mishchenko and A. Yu. Kolesov},
     title = {Asymptotical theory of relaxational oscillations},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {3--84},
     year = {1991},
     volume = {197},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1991_197_a0/}
}