@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/