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@article{IM_1982__66_142877, author = {Fumio Ichikawa}, title = {Finitely {Determined} {Singularities} of {Formal} {Vector} {Fields.}}, journal = {Inventiones mathematicae}, pages = {199--214}, publisher = {mathdoc}, volume = {66}, year = {1982}, zbl = {0491.58025}, url = {http://geodesic.mathdoc.fr/item/IM_1982__66_142877/} }
Fumio Ichikawa. Finitely Determined Singularities of Formal Vector Fields.. Inventiones mathematicae, Tome 66 (1982), pp. 199-214. http://geodesic.mathdoc.fr/item/IM_1982__66_142877/