@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}, volume = {8}, year = {1966}, pages = {1-20}, mrnumber = {210045}, zbl = {0151.28601}, language = {en}, url = {http://dml.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) pp. 1-20. http://gdmltest.u-ga.fr/item/CTGDC_1966__8__A4_0/
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