A. G. Walker, Canonical form for a Riemannian space with a parallel field of null planes, Quart. J. Math., Oxford Ser. (2) 1 (1950), 69–79. MR MR0035085(11,688d)

Review includes

Helga Baum, Holonomy groups of Lorentzian manifolds – A status report, 2011 (pdf)

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