@article{1183415182,
author = {Snyder, Virgil},
title = {Geometry of some differential expressions in hexaspherical
co\"ordinates},
journal = {Bull. Amer. Math. Soc.},
volume = {4},
number = {8},
year = {1898},
pages = { 144-154},
language = {en},
url = {http://dml.mathdoc.fr/item/1183415182}
}
Snyder, Virgil. Geometry of some differential expressions in hexaspherical
coördinates. Bull. Amer. Math. Soc., Tome 4 (1898) no. 8, pp. 144-154. http://gdmltest.u-ga.fr/item/1183415182/