%0 Journal Article %A E. A. Grebenikov %T New constructive methods for analysis of resonant systems %J Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica %D 2003 %P 69-77 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/BASM_2003_1_a6/ %G en %F BASM_2003_1_a6