ERRATUM TO "ON LORENTZIAN QUASI-EINSTEIN MANIFOLDS, J. KOREAN MATH. SOC. 48 (2011), NO. 4, PP. 669-689"

References

1. U. C. De and B. K. De, On quasi Einstein manifolds, Commun. Korean Math. Soc. 23 (2008), no. 3, 413-420. https://doi.org/10.4134/CKMS.2008.23.3.413
2. R. Deszcz and M. Hotlos, On hypersurfaces with type number two in space forms, Annales Univ. Sci. Budapest. Eotvos Sect. Math. 46 (2003), 19-34.
3. R. Deszcz, L. Verstraelen, and S. Yaprak, Pseudosymmetric hypersurfaces in 4-dimensional spaces of constant curvature, Bull. Inst. Math. Acad. Sinica 22 (1994), no. 2, 167-179.