@article{GDZPPN002092565, title = {Local Normal Forms of Functions.}, journal = {Inventiones mathematicae}, volume = {34}, year = {1976}, pages = {87-110}, zbl = {0336.57022}, url = {http://dml.mathdoc.fr/item/GDZPPN002092565} }
Arnold, V.I. Local Normal Forms of Functions.. Inventiones mathematicae, Tome 34 (1976) pp. 87-110. http://gdmltest.u-ga.fr/item/GDZPPN002092565/