[1] M. M. Tripathi, E. Kilic, S. Y. Perktas and S. Keles, Indefinite
almost paracontact metric manifolds, International Journal of
Mathematics and Mathematical Sciences (2010), 1-19.
[2] S. Kr. Srivastava, D. Narain and K. Srivastava, Properties of
paracontact manifold, VSRD-TNTJ 2(11)
(2011), 559-569.
[3] M. Girtu, An almost 2-paracontact structure on the cotangent
bundle of a Cartan space, Hacettepe Journal of Mathematics and
Statistics 33 (2004), 15-22.
[4] M. Ahmad and J.-B. Jun, Submanifolds of an almost
r-paracontact Riemannian manifold endowed with a semi-symmetric
non-metric connection, Journal of The Chungcheong Mathematical Society
22(4) (2009), 653-664.
[5] I. Kupeli Erken, Some classes of 3-dimensional normal almost
paracontact metric manifolds, Honam Mathematical J. 37(4) (2015),
457-468.
[6] I. Kupeli Erken, On normal almost paracontact metric manifolds of
dimension 3, 30(5) (2015), 777-788.
[7] M. B. Cappelletti, I. Kupeli Erken and C. Murathan, Nullity
conditions in paracontact geometry, Differential Geom. Appl. 30
(2012), 665-693.
[8] J. Welyczko, Slant curves in 3-dimensional normal almost
paracontact metric manifolds.
http://arxiv.org/abs/1212.5839v1, 2012.
[9] I. Kupeli Erken and C. Murathan, A complete study of
three-dimensional paracontact
arxiv.org/abs/1305.1511v3, 2013.
[10] M. Manev and M. Staikova, On almost paracontact Riemannian
manifolds of type Journal of Geometry 72(1-2) (2001),
108-115.
[11] K. P. Pandey and B. Tiwari, On indefinite almost paracontact
metric manifold, International Mathematical Forum 6(22) (2011),
1071-1078.
[12] S. S. Shukla and U. S. Verma, Paracomplex paracontact
pseudo-Riemannian submersions, Hindawi Publishing Corporation Geometry
2014 (2014), 1-12.
[13] Y. Gunduzalp and B. Sahin, Paracontact semi-Riemannian
submersions, Turkish Journal of Mathematics 37 (2013), 114-128.
[14] A. Bucki, Product submanifold almost r-paracontact
Riemannian manifold of p-Sasakian type, Soochov Journal of
Mathematics 24(4) (1998), 255-259.
[15] B. E. Acet, E. Kilic and S. Y. Perktas, Some curvature conditions
on a para-Sasakian manifold with canonical paracontact connection,
International Journal of Mathematics and Mathematical Sciences 2012
(2012), 1-24.
[16] M. Ahmad, A. Haseeb, J.-B. Jun and S. Rahman, On almost
r-paracontact Riemannian manifold with a certain connection,
Commun. Korean Math. Soc. 25(2) (2010), 235-243.
[17] G. Nakova and S. Zamkovoy, Almost paracontact manifold.
arXiv:0806.3859v2, 2009.
[18] Z. Kasap and M. Tekkoyun, Mechanical systems on almost
para/pseudo-Kähler- Weyl manifolds, IJGMMP 10(5) (2013), 1-8.
[19] Z. Kasap, Weyl-mechanical systems on tangent manifolds of
constant W-sectional curvature, IJGMMP 10(10) (2013), 1-13.
[20] M. Tekkoyun, On para-Euler-Lagrange and para-Hamiltonian
equations, Phys. Lett. A 340 (2005), 7-11.
[21] S. Zamkovoy, Canonical connections on paracontact manifolds,
Annals of Global Analysis and Geometry 36(1) (2009), 37-60.
[22] Y. Watanabe, Almost Hermitian and Kähler structures on product
manifolds, Proceedings of the Thirteenth International Workshop on
Diff.-Geom. 13 (2009), 1-16.
[23] A. Newlander and L. Nirenberg, Complex analytic coordinates in
almost complex manifolds, Ann. of Math. 65 (1957), 391-404.
[24] S. M. Salamon, Hermitian geometry.
http://calvino.polito.it/~salamon/G/bfs.pdf
[25] M. Falcitelli and A. Farinola, Almost-Hermitian geometry,
Differential Geometry and its Applications 4 (1994), 259-282.
[26] D. McDu and D. Salamon, J-Holomorphic Curves and Quantum
Cohomology, 1995.
[27] J. Klein, Escapes Variationnels et Mécanique, Ann. Inst.
Fourier, Grenoble 12 (1962).
[28] A. Ibord, The geometry of dynamics, Extracta Mathematicable 11(1)
(1996), 80-105.
[29] M. De Leon and P. R. Rodrigues, Methods of Differential Geometry
in Analytical Mechanics, North-Hol. Math. St., 152, Elsevier Sc. Pub.
Com. Inc., Amsterdam, 1989.
[30] R. Miron, D. Hrimiuc, H. Shimada and S. V. Sabau, The Geometry of
Hamilton and Lagrange Spaces, Kluwer Academic Publishers, 2002.
[31] H. Weyl, Space-Time-Matter, Dover Publ. 1922, Translated from the
4th German Edition by H. Brose, 1952.