Canonical connections on paracontact manifolds

Blair D.E.: Contact Manifolds in Riemannian Geometry: Lecture Notes in Mathematics, vol. 509. Springer, Berlin (1976)

Blair D.E.: Riemannian Geometry of Contact and Symplectic Manifolds. Birkhäuser, Boston (2002)

Bucki D., Miernowski A.: Almost r-paracontact connections. Acta Math. Hung. 45(3–4), 327–336 (1985)

Erdem S.: On almost (para)contact (hyperbolic) metric manifolds and harmonicity of $${(\varphi,\varphi')}$$ -holomorphic maps between them. Houston Math. J. 28(1), 21–45 (2002)

Friedrich Th., Ivanov S.: Parallel spinor and connections with skew-symmetric torsion in string theory. Asian J. Math. 6, 303–336 (2002)

Hasan Shahid, M.: Differential Geometry of CR-Submanifolds of a Normal Almost Para Contact Manifold. International Centre for Theoritical Physics, Trieste, Italy (1992)

Kaneyuki S., Konzai M.: Paracomplex structures and affine symmetric spaces. Tokyo J. Math. 8, 301–318 (1985)

Kaneyuki S., Willams F.L.: Almost paracontact and parahodge structures on manifolds. Nagoya Math. J. 99, 173–187 (1985)

Olszak Z.: On contact metric manifolds. Tohoku Math. J. 31, 247–253 (1979)

Rahman, M.S.: A study of Para-Sasakian Manifolds. International Centre for Theoritical Physics, Trieste, Italy (1995)

Tanaka N.: On non-degenerate real hypersurfaces, graded Lie algebras and Cartan connections. Japan J. Math. 2, 131–190 (1976)

Tanno S.: Ricci curvarures of contact Riemannian manifolds. Tohoku Math. J. 40, 441–448 (1988)

Tanno S.: Variational problems on contact Riemannian manifolds. Trans. Amer. Math. Soc. 314(1), 349–379 (1989)

Webster S.M.: Pseudo-hermitian structures on a real hypersurface. J. Diff. Geom. 13, 25–41 (1979)