%0 Journal Article %A Natalia Gherstega %A Mihail Popa %T Lie algebras of the operators and three-dimensional polynomial differential systems %J Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica %D 2005 %P 51-64 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/BASM_2005_2_a2/ %G en %F BASM_2005_2_a2