@article{1183503570,
author = {van Kampen, E. R.},
title = {Elementary proof of a theorem on Lorentz matrices},
journal = {Bull. Amer. Math. Soc.},
volume = {47},
number = {11},
year = {1941},
pages = { 288-290},
language = {en},
url = {http://dml.mathdoc.fr/item/1183503570}
}
van Kampen, E. R. Elementary proof of a theorem on Lorentz matrices. Bull. Amer. Math. Soc., Tome 47 (1941) no. 11, pp. 288-290. http://gdmltest.u-ga.fr/item/1183503570/