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@article{MAN_1978__233_163099, author = {S.M. Webster}, title = {On the {Moser} {Normal} {Form} ata {Non-Umbilic} {Point.}}, journal = {Mathematische Annalen}, pages = {97--102}, publisher = {mathdoc}, volume = {233}, year = {1978}, zbl = {0358.32013}, url = {http://geodesic.mathdoc.fr/item/MAN_1978__233_163099/} }
S.M. Webster. On the Moser Normal Form ata Non-Umbilic Point.. Mathematische Annalen, Tome 233 (1978), pp. 97-102. http://geodesic.mathdoc.fr/item/MAN_1978__233_163099/