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• [1] Bishop, R.L. and O’Neill, B., Manifolds of negative curvature, Trans. Amer. Math. Soc., 145 (1969), 1-49.
• [2] Chen, B.Y., Twisted product CR-submanifolds in Kaehler manifolds, Tamsui Oxf. J. Math. Sci., 16 (2000), 105-121.
• [3] Chen, B.Y., Geometry of warped product CR-submanifolds in Kaehler manifolds, Monatsh. Math., 133 (2001), 177-195.
• [4] Chen, B.Y., Geometry of warped product CR-submanifolds in Kaehler manifolds II, Monatsh. Math., 134 (2001), 103-119.
• [5] Fernandez, L.M., Garcia, R.E., Kupeli, D.N. and Unal, B., A curvature condition for a twisted product to be a warped product, Manuscripta Math., 106 (2001), 213-217.
• [6] Gray, A., Nearly Kaehler manifolds, J. Diff. Geom., 4 (1970), 283-309.
• [7] Khan, K.A. and Khan, V.A., Totally umbilical CR-submanifolds of a nearly Kaehler manifold, Geom. Dedicata, 50 (1994), 47-51.
• [8] Khan, V.A., Khan, K.A. and Uddin S., Warped product CR-submanifolds of a nearly Kaehler manifold, SUT Math. J., 43 (2007), 201-213.
• [9] Munteanu, M.I., Doubly warped products CR-submanifolds in locally conformal Kaehler manifolds, Monatsh. Math., 150 (2007), 333-342.
• [10] Ponge R. and Reckziegel H., Twisted products in pseudo-Riemannian geometry, Geom. Ded- icata, 48 (1993), 15-25.
• [11] Unal, B., Doubly warped products, PhD Thesis, University of Missouri-Columbia, 2000.
• [12] Unal, B., Doubly warped products, Diff. Geom. Appl., 15 (2001), 253-263.
• [13] Yano, K. and Kon, M., Structures on manifolds, Series in Pure Mathematics, World Scientific Publishing co., Singapore, 1984.