@article{GDZPPN002051060,
title = {Ludwig Schlaefli \"uber den physikalischen Raum.},
journal = {Commentarii mathematici Helvetici},
volume = {3},
year = {1931},
pages = {148-150},
zbl = {0002.08902},
url = {http://dml.mathdoc.fr/item/GDZPPN002051060}
}
Linder, Arthur. Ludwig Schlaefli über den physikalischen Raum.. Commentarii mathematici Helvetici, Tome 3 (1931) pp. 148-150. http://gdmltest.u-ga.fr/item/GDZPPN002051060/