References
- C. Atindogbe and K. L. Duggal, Conformal screen on lightlike hypersurfaces, Int. J. Pure Appl. Math. 11 (2004), no. 4, 421-442.
- C. Atindogbe, J.-P. Ezin, and J. Tossa, Lightlike Einstein hypersurfaces in Lorentzian manifolds with constant curvature, Kodai Math. J. 29 (2006), no. 1, 58-71. https://doi.org/10.2996/kmj/1143122387
- J. Dong and X. Liu, Totally umbilical lightlike hypersurfaces in Robertson-Walker space-times, ISRN Geom. 10 (2014) pages Art. ID 974695.
- K. L. Duggal and A. Bejancu, Lightlike Submanifolds of Semi-Riemannian Manifolds and Applications, Kluwer Academic Publishers, Dordrecht, 1996.
- K. L. Duggal and A. Gimenez, Lightlike hypersurfaces of Lorentzian manifolds with distinguished screen, J. Geom. Phys. 55 (2005), no. 1, 107-122. https://doi.org/10.1016/j.geomphys.2004.12.004
- M. Gutierrex and B. Olea, Lightlike hypersurfaces in Lorentzian manifolds, arXiv: 1207.1030v1 [math.DG] 4 Jul., 2012.
- T. H. Kang, On lightlike hypersurfaces of a GRW space-time, Bull. Korean Math. Soc. 49 (2012), no. 4, 863-874. https://doi.org/10.4134/BKMS.2012.49.4.863
- X. Liu and Q. Pan, On horizontal lightlike hypersurfaces of Robertson-Walker space-times, Commun. Korean Math. Soc. 30 (2015), no. 2, 109-121. https://doi.org/10.4134/CKMS.2015.30.2.109
- M. Navarro, O. Palmas, and D. A. Solis, Null hypersurfaces in generalized Robertson-Walker spacetimes, J. Geom. Phys. 106 (2016), 256-267. https://doi.org/10.1016/j.geomphys.2016.04.009
- B. O'Neill, Semi-Riemannian Geometry with Applications to Relativity, Academic Press, New York, 1982.