___

• [1] Akbar, M.M., Woolgar, E., Ricci solitons and Einstein-scalar field theory , Class. Quantum Grav., 26, 055015 (14pp), 2009, doi:10.1088/0264-9381/26/5/055015.
• [2] Alekseevski, D. V., Cort´es, V., Galaev, A. S., Leistner, T. , Cones over pseudo-Riemannian manifolds and their holonomy, J. Reine Angew. Math., 635 (2009), 23-69.
• [3] Alekseevski, D. V., Medori, C., Tomassini, A., Maximally homogeneous para-CR manifolds, Ann. Global Anal. Geom., 30 (2006), 1-27.
• [4] Brozos-Vazquez, M., Calvaruso, G., Garcia-Rio, E., Gavino-Fernandez, S., Three-dimensional Lorentzian Homogenous Ricci Solitons, Israel J Math 188 (2012), 385-403.
• [5] Case, J. S., Singularity theorems and the Lorentzian splitting theorem for the Bakry Emery Ricci Tensor, Journal of Geometry and Physics 60 (2010), 477-490.
• [6] Chow, B., Knopf, D., The Ricci flow: an introduction, volume 110 of Mathematical Surveys and Monographs, American Mathematical Society, Providence, RI, 2004.
• [7] Cort´es, V., Mayer, C., Mohaupt, T., Saueressing, F., Special geometry of Euclidean super- symmetry 1. Vector multiplets, J. High Energy Phys., 0403 (2004), 028, 73 pp.
• [8] Cort´es, V., Lawn, M. A., Sch¨afer, L., Affine hyperspheres associated to special para-Ka¨hler manifolds, Int. J. Geom. Methods Mod. Phys., 3 (2006), 995-1009.
• [9] Dacko, P., On almost paracosymplectic manifolds, Tsukuba J. Math. 28 (2004), no.1, 193-213.
• [10] Das, S., Prabhu, K., Sayan K., Int. J. Geom. Methods Mod. Phys. 07, 837 (2010). DOI:10.1142/S0219887810004579.
• [11] De, U.C., Turan, M., Yıldız, A., De, A., Ricci solitons and gradient Ricci solitons on 3- dimensional normal almost contact metric manifolds, Publ. Math. Debrecen, Ref. no.: 4947, (2012), 1-16.
• [12] Erdem, S., On almost (para)contact (hyperbolic) metric manifolds and harmonicity of (φ, φ′)- holomorphic maps between them, Houston J. Math., 28 (2002), 21-45.
• [13] Erdem, S., On almost (para)contact (hyperbolic) metric manifolds and harmonicity of (φ, φ′)- holomorphic maps between them, Houston J. Math., 28 (2002), 21-45.
• [14] Friedan, D., Nonlinear models in 2 + ε dimensions, Ann. Phys., 163(2), 318-419, 1985.
• [15] Ghosh, A., Kenmotsu 3-metric as a Ricci soliton, Chaos, Solitons & Fractals 44 (8), 2011, 647–650.
• [16] Ghosh, A., Sharma, R., Cho, J.T., Contact metric manifolds with η-parallel torsion tensor, Annals of Global Analysis and Geometry, 34, 287-299, 2008.
• [17] Hamilton, R. S., Three-manifolds with positive Ricci curvature. J. Di . Geo., 17:255-306,1982
• [18] Hamilton, R. S., The Ricci flow on surfaces, Mathematics and general relativity (SantaCruz, CA,1986), Contemp. Math. 71, A.M.S., 237-262, 1988.
• [19] Ivey, T., Ricci solitons on compact 3-manifolds, Differential Geo. Appl. 3, 301-307, 1993.
• [20] Kaneyuki, S., Konzai, M., Paracomplex structure and affine symmetric spaces, Tokyo J. Math., 8 (1985), 301-308.
• [21] Kaneyuki, S., Willams, F. L., Almost paracontact and parahodge structure on manifolds, Nagoya Math. J., 99, 173-187, 1985.
• [22] Kholodenko, A. L., Towards physically motivated proofs of the Poincar´e and the geometriza- tion conjectures, Journal of Geometry and Physics 58, 259–290, 2008.
• [23] Nagaraja, H.G., Premalatha, C.R., Ricci solitons in Kenmotsu manifolds, Journal of Mathe- matical Analysis, vol. 3, no. 2, pp. 18–24, 2012.
• [24] Payne, T. L., The existence of soliton metrics for nilponent Lie Groups, Geometriae Dedicate 145 (2010), 71-88.
• [25] Perelman, G., The entropy formula for the Ricci flow and its geometric applications,ArXiv:math.DG/0211159
• [26] Sharma, R., Certain Results on K-Contact and (k, µ)-Contact Manifolds, J. Geom. 89 (2008), 138-147.
• [27] Sharma, R., Ghosh, A., Sasakian 3-manifolds as a Ricci soliton represents the Heisenberg group, International Journal of Geometric Methods in Modern Physics, 2011 08:01, 149-154
• [28] Tripathi, M.M., Ricci solitons in contact metric manifolds, arXiv:0801.4222, 2008.
• [29] Turan, M., De, U.C., Yıldız, A.,Ricci solitons and gradient Ricci solitons in three- dimensional trans-Sasakian manifolds, Filomat, Volume 26, Issue 2, Pages: 363-370, 2012, doi:10.2298/FIL1202363T.
• [30] Willmore, T.J., Differential Geometry, Clarendon Press, Oxford, 1958.
• [31] Woolgar, E., Some applications of Ricci flow in physics, Canadian Journal of Physics, 2008, 86(4): 645-651, 10.1139/p07-146.
• [32] Welyczko, J., Legendre curves in 3-dimensional Normal almost paracontact metric manifolds, Result. Mth. 54 (2009), 377-387.
• [33] Welyczko, J., Slant curves in 3-dimensional normal almost paracontact metric manifolds, Mediterr. J. Math. 11 (2014), no. 3, 965978.
• [34] Zamkovoy, S.,Canonical connection on paracontact manifolds, Ann. Glob. Anal. Geo., 36 (2009), 37-60.