@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/}
}