@article{DE_1972_8_6_a1,
     author = {N. S. Muminov},
     title = {The structure of the family of trajectories in the neighborhood of a singular point of a first order differential equation of second degree},
     journal = {Differencialʹnye uravneni\^a},
     pages = {953--963},
     publisher = {mathdoc},
     volume = {8},
     number = {6},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1972_8_6_a1/}
}