@article{AIHPA_1979__31_4_387_0,
     author = {Norris, L. K. and Davis, W. R.},
     title = {Infinitesimal holonomy group structure and geometrization},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {387--398},
     publisher = {Gauthier-Villars},
     volume = {31},
     number = {4},
     year = {1979},
     mrnumber = {574142},
     zbl = {0432.53054},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AIHPA_1979__31_4_387_0/}
}