@article{1183500529,
author = {Kasner, Edward and de Cicco, John},
title = {The geometry of the whirl-motion group $G\_6$: elementary invariants},
journal = {Bull. Amer. Math. Soc.},
volume = {44},
number = {11},
year = {1938},
pages = { 399-403},
language = {en},
url = {http://dml.mathdoc.fr/item/1183500529}
}
Kasner, Edward; de Cicco, John. The geometry of the whirl-motion group $G_6$: elementary invariants. Bull. Amer. Math. Soc., Tome 44 (1938) no. 11, pp. 399-403. http://gdmltest.u-ga.fr/item/1183500529/