[1] J. A. Alvarez Lopez and E. Garcia-Rio, Differential Geometry,
Proceedings of VIII Inter. Colloquiun, World Scientific.
[2] A. Banyaga, Symplectic geometry and related structures, Cubo Math.
J. 6(1) (2004), 123-138.
[3] M. Barros and A. Romero, Indefinite Kaehler manifolds, Math. Ann.
261 (1982), 55-62.
[4] A. Cannas da Silva, Lecture Note on Symplectic Geometry,
Springer-Verlag, Berlin, Heidelberg, 2001.
[5] K. L. Duggal and A. Bejancu, Lightlike Submanifolds of
Semi-Riemannian Manifolds and Applications, Mathematics and its
Applications, Kluwer Acad. Publishers, Dordrecht, 1996.
[6] K. L. Duggal and A. Bejancu, Spacelike geometry of
CR-structures.
[7] J. Ezin, M. Hassirou and J. Tossa, Divergence theorem for
symmetric (0, 2)-tensor fields on semi-Riemannian manifold with
boundary, Kodai Math. J. 30(1) (2007), 41-54.
[8] E. Fazilet, Degenerate Hermitian manifolds, Math. Phys. Anal.
Geom. 8 (2005), 361-387.
[9] T. Fukami and S. Ishihara, Almost Hermitian structure on
Tohoku Math. J. 7 (1955), 151-156.
[10] D. N. Kupeli, Degenerate manifolds, Geom. Dedicata 23(3) (1987),
259-290.
[11] A. Nersessian and E. Ramos, Massive spinning particles and
geometry of null curves, Phys. Lett. B 445 (1998), 123-128.
[12] J. Rosen, Embedding of various relativistic Riemannian spaces in
pseudo-Riemannian spaces, Rev. Moder. Phys. 37(1) (1965), 204-214.
[13] W. Thurston, Some examples of symplectic manifolds, Proc. Amer.
Math. Soc. 55 (1976), 467-468.
[14] A. Weinstein, Lectures on Symplectic Manifolds, Amer. Math. Soc.
BSMS 55, Providence, RI, 1977.