@article{RM_1968_23_6_a12,
     author = {V. I. Arnol'd},
     title = {A~letter to the editors},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {23},
     number = {6},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1968_23_6_a12/}
}