1. Aharonov, Y., and Vaidman, L. (1995),Ann. N.Y. Acad. Sci. 755, 361–373.
2. Ashtekar, A. (1989),Ann. N.Y. Acad. Sci. 571, 16–26.
3. Barbour, J.B. (1994a), in: Halliwell, J.J., Perez-Mercader, J., and Zurek, W.H., eds.,Physical Origins of Time Asymmetry (Cambridge University Press, Cambridge), pp. 405–414; (1994b),Class. Quant. Grav. 11, 2853–2873; (1994c),Class. Quant. Grav. 11, 2875–2897; (1995), in: Barbour and Pfister, pp. 214–236.
4. Barbour, J.B., and Pfister, H. (1995),Mach's Principle: From Newton's Bucket to Quantum Gravity (Einstein Studies6) (Birkhäuser, Boston).
5. Barry, D. (1995),Denver Post Magazine, 15 January, pp. 6–7.