@article{DE_1970_6_8_a27,
     author = {A. D. Myshkis},
     title = {Letter to the editors},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1532},
     publisher = {mathdoc},
     volume = {6},
     number = {8},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1970_6_8_a27/}
}