Bibliography

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Thomas Thiemann, Quantum spin dynamics (QSD), preprint available as gr-qc/9606089.

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Anomaly-free formulation of non-perturbative, four-dimensional Lorentzian quantum gravity, Phys. Lett. B380 (1996) 257-264, preprint available as gr-qc/9606088.

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2

John Baez, This Week's Finds in Mathematical Physics, Weeks 85 - 88, available at http://math.ucr.edu/home/baez/twf.html or by request to the author.