A. Einstein, Sitzungsber. Preuss. Akad. Wiss. Berlin (Math. Phys.) 1916, 1111 (1916)
D. Hilbert, Gott. Nachr. 27, 395 (1915)
A.S. Eddington, The Mathematical Theory of Relativity (Cambridge University Press, Cambridge, 1923)
E. Schrödinger, Space–Time Structure (Cambridge University Press, Cambridge, 1950)
H. Weyl, Space-Time-Matter (Methuen and Co. Ltd., London, 1922)
M. Banados, P.G. Ferreira, Phys. Rev. Lett. 105, 011101 (2010). arXiv:1006.1769 [astro-ph.CO]
J. Kijowski, R. Werpachowski, Rept. Math. Phys. 59, 1 (2007). arXiv:gr-qc/0406088
D.A. Demir, Phys. Rev. D 90(6), 064017 (2014). arXiv:1409.2572 [gr-qc]
N. Poplawski, Gen. Rel. Grav. 46, 1625 (2014). arXiv:1203.0294 [gr-qc]
H. Azri, Class. Quant. Grav. 32(6), 065009 (2015). arXiv:1501.06177 [gr-qc]
H. Azri, doi: 10.1002/andp.201500270 . arXiv:1511.06600 [gr-qc]
A. Einstein, E.G. Straus, Ann. Math. 47, 731 (1946)
M. Ferraris, J. Kijowski, Gen. Relativ. Gravit. 14, 37 (1982)
N.J. Poplawski, Mod. Phys. Lett. A 22, 2701 (2007). arXiv:gr-qc/0610132
N.J. Poplawski. arXiv:0705.0351 [gr-qc]
I.L. Shapiro, Phys. Rept. 357, 113 (2002). doi: 10.1016/S0370-1573(01)00030-8 . arXiv:hep-th/0103093
A. Palatini, Rend. Circ. Mat. (Palermo) 43, 203 (1919)
N.J. Poplawski. arXiv:0911.0334 [gr-qc]
K.B. Petersen, M.S. Pedersen, The Matrix Cookbook (Technical University of Denmark, Lyngby, 2006)
C.N. Karahan, O. Dogangun, D.A. Demir, Annalen Phys. 524, 461 (2012). arXiv:1204.6366 [gr-qc]
E. Schrödinger, Nature 153, 572 (1944)
S.M. Carroll, Spacetime and Geometry: An Introduction to General Relativity (Addison-Wesley, San Francisco, 2004)
I. Gelfand, M. Kapranov, A. Zelevinsky, Adv. Math. 96, 226 (1992)
V. Tapia, J. Phys. A Math. Theor. 40, 5525 (2007). arXiv:math-ph/0702001
V. Tapia, Int. J. Mod. Phys. D 2, 413 (1993). arXiv:hep-th/9303019 ; arXiv:math-ph/0208010
D.A. Demir. arXiv:1510.05570 [hep-ph]
