@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/