@article{GDZPPN002259915,
title = {A characteristic property of isothermal systems of curves},
journal = {Mathematische Annalen},
volume = {58},
year = {1904},
pages = {352-354},
zbl = {35.0622.03},
url = {http://dml.mathdoc.fr/item/GDZPPN002259915}
}
Kasner, Edward. A characteristic property of isothermal systems of curves. Mathematische Annalen, Tome 58 (1904) pp. 352-354. http://gdmltest.u-ga.fr/item/GDZPPN002259915/