@article{DE_1987_23_11_a19,
     author = {A. V. Kozulin},
     title = {A third order differential equation with six singular points},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1997--1998},
     publisher = {mathdoc},
     volume = {23},
     number = {11},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_11_a19/}
}