%0 Journal Article %A A. A. Shestakov %T The study by the generalized Briot--Bouquet method of the properties of solutions near singular initial values of a nonautonomous differential system %J Differencialʹnye uravneniâ %D 1975 %P 470-483 %V 11 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1975_11_3_a6/ %G ru %F DE_1975_11_3_a6