Bibliography

• Thorne, Kip S. and Morris, Michael S.. Wormholes in spacetime and their use for interstellar travel: A tool for teaching general relativity. Am. J. Phys. 56(6), May 1988.
• Thorne, Kip S.. Black Holes and Time Warps, Einstein's Outrageous Legacy. W.W. Norton & Company Inc., 1994.
• Macvey, John W.. Time Travel, A Guide to Journeys in the Fourth Dimension. Scarborough House/Publishers, 1990.
• Wolf, Fred Alan. Parallel Universes, The Search for Other Worlds. Touchstone Simon and Schuster, 1988.
• Halpern, Paul. Cosmic Wormholes, The Search for Interstellar Shortcuts. DUTTON, the Penguin Group, 1992.
• Hawking, Stephen. A Brief History of Time, From the Big Bang to Black Holes. Bantam, 1988.
• Novello, M., Svaiter, N.F., and Guimaraes,M.E.X.. Backwards Time-Travel Induced by Combined Magnetic and Gravitational Fields. Modern Physics Letters A, Vol. 7, No. 5 (1992) 381-386.
• Deser S.. Physical Obstacles to Time-Travel. Classical and Quantum Gravity 10 (1993) S67-S73. IOP Publishing Ltd., 1993.
• Antonsen Frank, and Bormann, Karsten. Problems in Time-Machine Construction due to Wormhole Evolution. International Journal of Theoretical Physics, Vol. 34, No. 10, 1995.
• Allen, Bruce and Simon, Jonathan. Time Travel on a String. Nature Vol. 357, 7 May 1992.
• Hawking, Stephen. The Beginning of Time. Lecture on the World Wide Web. http://www.damtp.cam.ac.uk/user/hawking/home.html
• Figures 3,4,5, and 6 are from Thorne, Kip S.. Black Holes and Time Warps, Einstein's Outrageous Legacy. W.W. Norton \& Company Inc., 1994.
• Figure 1 is from PBS online's Web Page about Einstein.