@article{DE_1973_9_7_a21,
     author = {A. M. Markina},
     title = {Forms of movable singularities of a certain differential system},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1349--1350},
     publisher = {mathdoc},
     volume = {9},
     number = {7},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_7_a21/}
}