@article{DE_1981_17_9_a18,
     author = {N. I. Vulpe},
     title = {Polynomial basis of centroaffine comitants of a homogeneous cubic differential system},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1682--1684},
     publisher = {mathdoc},
     volume = {17},
     number = {9},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1981_17_9_a18/}
}