Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1997_61_2_a3, author = {O. V. Lychagina}, title = {Normal forms of {Poisson} structures}, journal = {Matemati\v{c}eskie zametki}, pages = {220--235}, publisher = {mathdoc}, volume = {61}, number = {2}, year = {1997}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1997_61_2_a3/} }
O. V. Lychagina. Normal forms of Poisson structures. Matematičeskie zametki, Tome 61 (1997) no. 2, pp. 220-235. http://geodesic.mathdoc.fr/item/MZM_1997_61_2_a3/