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@article{CTGDC_1966__8__A4_0, author = {Maltz, Robert}, title = {The nullity spaces of the curvature operator}, journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques}, note = {talk:4}, pages = {1--20}, publisher = {CNRS}, volume = {8}, year = {1966}, mrnumber = {210045}, zbl = {0151.28601}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CTGDC_1966__8__A4_0/} }
Maltz, Robert. The nullity spaces of the curvature operator. Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 8 (1966), Exposé no. 4, 20 p.. http://geodesic.mathdoc.fr/item/CTGDC_1966__8__A4_0/