[1] Naber George, L. (1992) The Geometry of Minkowski Spacetime. An Introduction to the Mathematics of Special Theory of Relativity. Dover.
[2] David, H. and Rensick (with the Assistance of Farrell Edwards and John Merrill) (1970) Fundamentals of Physics. John Wiley & Sons, Inc., Hoboken.
[3] Dirac, P.A.M. (1928) The Quantum Theory of Electron. Proceedings of the Royal Society A, 117, 610-624.
[4] Sudarshan, E.C.G. (1970) Physics of Complex Mass Particles. University of Texas, Austin.
[5] Gerald, K. (2003) Quantum Physics, Relativity, and Complex Space Time: Toward a New Synthesis. (Originally published in 1990 by North-Holland, Amsterdam)
[6] Richard, F. (1963) The Feynman Lectures on Physics. Vol. III, Addison Wesley, Reading, 1-6.
[7] Mehran, R. (2010) Imaginary Relativity. Wseas Transaction on Communications, 9.
[8] Mayer Alexander, F. (2007) Wave Energy in Quantum Mechanics. Journal of Physics, Conference Series, 70, Article ID: 012013.
http://iopscience.iop.org/1712-6596/70/1/02013.
[9] Wall Ernst, L. (1995) The Vortex Theory of the Electron and its de Broglie Waves Pulse. Institute for Basic Research, Palm Harbor.
www.gwphysics.com
www.tachyonmodel.com
[10] John, W. and Wojceich, Z. (1983) The Quantum Postulate and the Recent Development of Atomic Theory. In: Quantum Theory and Measurement, Princeton University Press, Princeton, 111.
[11] Reza, A. (2014) Quantum Complex Matter Space. International Journal of Theoretical and Mathematical Physics, 4, 159-163.
http://dx.doi.org/10.1088/1742-6596/70/1/012013
[12] Zhang, T.X. (2008) Electric Charge as a form of Imaginary Energy. Progress in Physics, 2.
[13] Sudarshan, E.C.G. (1968) A New Formulation of Relativistic Quantum Theory of Fields with Applications to Particles Traveling Faster Than Light. Proceedings of Nobel Symposium on Elementary Particle Theory.
[14] Taylor, T.J.R., Zafirots, C.D. and Dubson, M.A. (2004) Modern Physics for Scientists and Engineers. 2nd Edition, Pearson-Printice Hall.