The nullity spaces of the curvature operator
Cahiers de topologie et géométrie différentielle, Tome 8 (1966), Exposé no. 4, 20 p. 
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     author = {Maltz, Robert},
     title = {The nullity spaces of the curvature operator},
     journal = {Cahiers de topologie et g\'eom\'etrie diff\'erentielle},
     note = {talk:4},
     pages = {1--20},
     publisher = {CNRS},
     volume = {8},
     year = {1966},
     mrnumber = {210045},
     zbl = {0151.28601},
     language = {en},
     url = {http://www.numdam.org/item/CTGDC_1966__8__A4_0/}
}
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Maltz, Robert. The nullity spaces of the curvature operator. Cahiers de topologie et géométrie différentielle, Tome 8 (1966), Exposé no. 4, 20 p. http://www.numdam.org/item/CTGDC_1966__8__A4_0/

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