1. Champagne, E. B. Holographic interferometry extended. In Digest of Papers, Int. Opt. Computing Conf., Zurich (IEEE, New York). 1974, 73–74.
2. Cuche, D. E. Modification methods in holographic and speckle interferometry. In Interferometry in Speckle Light (Jacquot, P. and Fournier, J. M., eds). Springer, Berlin, Heidelberg, New York, 2000, 109–114.
3. Stetson, K. A. Fringe interpretation for hologram interferometry of rigid-body motions and homogenous deformations. J. Opt. Soc. Am., 1974, 64, 1–10.
4. Walles, S. Visibility and localization of fringes in holographic interferometry of diffusely reflecting surfaces. Ark. Fys., 1970, 40, 299–403.
5. Schwarzschild, K. Ueber das Gravitationsfeld eines Massenpunktes. Sitzungsberichte der deutschen Akademie der Wissenschaften, Kl. Math.-Phys. Tech. Berlin, 1916, 189–196.
6. Misner, C. W., Thorne, K. S. and Wheeler, J. A. Gravitation. W. H. Freeman and Company, New York, 1972.
7. Plebanski, J. and Krasinski, A. An Introduction to General Relativity and Cosmology. Cambridge University Press, 2007, 196–200.
8. Sexl, R. U. and Urbantke, H. K. Gravitation und Kosmologie. 2nd edn. Wissenschaftsverlag, Wien, 1981, 53 and 240–243.
9. Kerr, R. P. Gravitational field of a spinning mass as an example of algebraically special metrics. Phys. Rev. Lett., 1963, 11(5), 237–238.
doi:10.1103/PhysRevLett.11.237
10. Goenner, H. Einführung in die spezielle und allgemeine Relativitätstheorie. Spektrum, Akademischer Verlag, Heidelberg, Oxford, 1996, 145–149 and 304.
11. Penrose, R. Structure of space-time. In Battelle Rencontres 1967 (Dewitt, C. M. and Wheeler, J. A., eds). Benjamin, New York, Amsterdam, 1968, 121–235.
12. Poisson, E. A Relativist’s Toolkit. Cambridge University Press, 2004.