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↑ Hawking, Stephen (27 April 2010). "STEPHEN HAWKING: How to build a time machine". Daily Mail. Dicapai pada 7 Ogos 2015. Tanda italik atau tebal tidak dibenarkan dalam: |publisher= (bantuan)

Paul Davies, About Time ISBN 0-684-81822-1How to Build a Time Machine ISBN 0-14-200186-4
J. Richard Gott, Time Travel in Einstein's Universe: The Physical Possibilities of Travel Through Time ISBN 0-618-25735-7
Gribbin, In Search of Schrodinger's Cat
Paul J. Nahin, Time Machines: Time Travel in Physics, Metaphysics, and Science Fiction ISBN 0-387-98571-9
Pagels, Perfect Symmetry, the Search for the Beginning of Time
Clifford A. Pickover, Time: A Traveler's Guide ISBN 0-19-513096-0
Kornel Lanczos, On a Stationary Cosmology in the Sense of Einsteins Theory of Gravitation, 1924, republished in 1997 by Springer Science+Business Media B.V.
W.J. van Stockum, The Gravitational Field of a Distribution of Particles Rotating about an Axis of Symmetry, 1936, Proceedings of the Royal Society of Edinburgh.
Frank J. Tipler, Rotating Cylinders and the Possibility of Global Causality Violation, Physical Review D 9 (1974), 2203

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