@article{DE_1984_20_4_a0,
     author = {V. A. Baltag and K. S. Sibirskii},
     title = {An integral of {Malkin} type and new cases of the center of a fractionally-cubic differential equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {555--562},
     publisher = {mathdoc},
     volume = {20},
     number = {4},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1984_20_4_a0/}
}