Geodesic
On Sectional Curvature of Indefinite Metrics.
Mathematische Annalen, Tome 232 (1978), pp. 267-272.

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@article{MAN_1978__232_163087,
     author = {Katsumi Nomizu and Larry Graves},
     title = {On {Sectional} {Curvature} of {Indefinite} {Metrics.}},
     journal = {Mathematische Annalen},
     pages = {267--272},
     publisher = {mathdoc},
     volume = {232},
     year = {1978},
     zbl = {0366.53007},
     url = {http://geodesic.mathdoc.fr/item/MAN_1978__232_163087/}
}
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%A Katsumi Nomizu
%A Larry Graves
%T On Sectional Curvature of Indefinite Metrics.
%J Mathematische Annalen
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Katsumi Nomizu; Larry Graves. On Sectional Curvature of Indefinite Metrics.. Mathematische Annalen, Tome 232 (1978), pp. 267-272. http://geodesic.mathdoc.fr/item/MAN_1978__232_163087/