@article{RM_1975_30_1_a10,
     author = {M. D. Bronshtein},
     title = {Differential equations that have nonanalytic solutions},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1975},
     volume = {30},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1975_30_1_a10/}
}