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• [1] Atceken, M., and Kilic, E., Semi Invariant Lightlike Submanifolds of a Semi-Riemannian Product Manifold, Kodai Math. J. Vol.30, No.3, 361-378, (2007).
• [2] Bejan, C.L., 2-Codimensional Lightlike Submanifolds of Almost Para-Hermitian Manifolds, Differential Geometry and Applications, 7-17, (1996).
• [3] Chen, B.Y.: Geometry of Warped Product CR-Submanifolds in Kaehler Manifolds, Monatsh. Math., Vol.133, No.3, 177-195, (2005).
• [4] Duggal, K.L., Warped Product of Lightlike Manifolds, Nonlinear Anaysis, 47, 3061-3072, (2001).
• [5] Duggal, K.L. and Bejancu, A., Lightlike Submanifolds of Semi-Riemannian Manifolds and Its Applications, Kluwer, Dortrecht, (1996).
• [6] Duggal, K.L. and Jin, D.H., Null Curves and Hypersurfaces of Semi-Riemannian Manifolds, World Scientific Publishing Co Pte Ltd, (2007).
• [7] Duggal, K.L. and Jin, D.H., Totally Umbilical Lightlike Submanifolds, Kodai Math. J., 26, 49-68, (2003).
• [8] Duggal, K.L. and Sahin, B., Screen Cauchy Riemannian Lightlike Submanifolds, Acta Mathematica Hungarica, 106, 1-2, 125-153, (2005).
• [9] Duggal, K. L. and Sahin B., Differential Geometry of Lightlike Submanifolds, Springer Birkhauser,2010.
• [10] Hawking, S.W. and Ellis, G.F.R., The large Scale Structure of Spacetime, Cambridge Univ. Press, Cambridge, (1972)
• [11] Kilic, E. and Sahin, B., Radical Anti Invariant Lightlike Submanifolds of Semi-Riemannian Product Manifolds, Turk. J. Math. 32, 429-449, (2008)
• [12] Kupeli, D.N., Singular semi-Riemannian geometry, kluwe Academic Publishers. 366, (1996)
• [13] Nomizu, K. and Sasaki, T., Affine Differential Geometry, Cambridge Univ. Press. Cambridge, (1994).
• [14] O’Neil, B., Semi Riemannian Geometry, Academic Press Inc., (1983).
• [15] Sahin, B., Warped Product Lightlike Submanifolds, Sarajevo Journal of Mathematics, Vol.1, 14, 251-260, (2005).
• [16] Senlin, X. and Yilong,N., Submanifolds of Product Riemannian Manifold, Acta Mathematica Scienta, 20(B), 213-218, (2000).
• [17] Yildirim, C. and Sahin, B., Screen Transversal Lightlike Submanifolds of Indefinite Sasakian Manifolds, An. Şt. Univ. Ovidius Constanta, Vol. 18(2), 315-336, (2010