@article{GDZPPN002292661, title = {Symmetrie and Smooth Functions of Several Variables.}, journal = {Mathematische Annalen}, volume = {154}, year = {1964}, pages = {285-292}, zbl = {0115.27301}, url = {http://dml.mathdoc.fr/item/GDZPPN002292661} }
NEUGEBAUER, C.J. Symmetrie and Smooth Functions of Several Variables.. Mathematische Annalen, Tome 154 (1964) pp. 285-292. http://gdmltest.u-ga.fr/item/GDZPPN002292661/