@article{1259943864,
author = {D. LUDDEN, Gerald},
title = {The prolongation of the holonomy group},
journal = {J. Math. Soc. Japan},
volume = {20},
number = {4},
year = {1968},
pages = { 634-637},
language = {en},
url = {http://dml.mathdoc.fr/item/1259943864}
}
D. LUDDEN, Gerald. The prolongation of the holonomy group. J. Math. Soc. Japan, Tome 20 (1968) no. 4, pp. 634-637. http://gdmltest.u-ga.fr/item/1259943864/