@article{GDZPPN002270846,
title = {Zur Theorie der unendlichen Differentialsysteme},
journal = {Mathematische Annalen},
volume = {95},
year = {1926},
pages = {544-556},
zbl = {52.0403.02},
url = {http://dml.mathdoc.fr/item/GDZPPN002270846}
}
Wintner, A. Zur Theorie der unendlichen Differentialsysteme. Mathematische Annalen, Tome 95 (1926) pp. 544-556. http://gdmltest.u-ga.fr/item/GDZPPN002270846/