@article{IM_1976__35_142401,
     author = {V.I. Arnold},
     title = {Local {Normal} {Forms} of {Functions.}},
     journal = {Inventiones mathematicae},
     pages = {87--110},
     publisher = {mathdoc},
     volume = {35},
     year = {1976},
     zbl = {0336.57022},
     url = {http://geodesic.mathdoc.fr/item/IM_1976__35_142401/}
}