@article{GDZPPN002156679,
title = {Elementary theorems relating to the geometry of a space of three dimensions and of uniform positive curvature in the fourth dimension.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {84},
year = {1877},
pages = {293-299},
zbl = {09.0381.03},
url = {http://dml.mathdoc.fr/item/GDZPPN002156679}
}
Newcomb, Simon. Elementary theorems relating to the geometry of a space of three dimensions and of uniform positive curvature in the fourth dimension.. Journal für die reine und angewandte Mathematik, Tome 84 (1877) pp. 293-299. http://gdmltest.u-ga.fr/item/GDZPPN002156679/