%0 Journal Article %A A. A. Kosov %A A. V. Sinitsyn %T Construction of the first integrals for a special class of nonlinear systems %J The Bulletin of Irkutsk State University. Series Mathematics %D 2012 %P 57-69 %V 5 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IIGUM_2012_5_1_a5/ %G ru %F IIGUM_2012_5_1_a5