@article{1183499319,
author = {Lewy, Hans},
title = {On the non-vanishing of the Jacobian in certain one-to-one mappings},
journal = {Bull. Amer. Math. Soc.},
volume = {42},
number = {12},
year = {1936},
pages = { 689-692},
language = {en},
url = {http://dml.mathdoc.fr/item/1183499319}
}
Lewy, Hans. On the non-vanishing of the Jacobian in certain one-to-one mappings. Bull. Amer. Math. Soc., Tome 42 (1936) no. 12, pp. 689-692. http://gdmltest.u-ga.fr/item/1183499319/