Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MZ_1971__123_171639, author = {Alfred Gray}, title = {Weak {Holonomy} {Groups.}}, journal = {Mathematische Zeitschrift}, pages = {290--300}, publisher = {mathdoc}, volume = {123}, year = {1971}, zbl = {0222.53043}, url = {http://geodesic.mathdoc.fr/item/MZ_1971__123_171639/} }
Alfred Gray. Weak Holonomy Groups.. Mathematische Zeitschrift, Tome 123 (1971), pp. 290-300. http://geodesic.mathdoc.fr/item/MZ_1971__123_171639/