Some References for Second Required Paper

• Christopher Ray: The evolution of relativity, A. Hilger c1987
• Raymond Flood and Michael Lockwood: The Nature of Time, Blackwell 1986
• Kip Thorne: Black Holes and Time Warps, W. W. Norton, 1993
• Robert Wald: Space, time, and gravity: the theory of the big bang and black holes, Univ. of Chicago Press,1992
• Paul Nahin: Time Machines: time travel in physics, metaphysics, and science fiction , Blackwell 1986
• Lawrence Krauss: The Physics of Star Trek, Basic Books, 1995
• John A. Wheeler:At home in the universe,American Institute of Physics, c1992