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[1] http://loops11.iem.csic.es/loops11/index.php?option=com_content&view=article&id=75&Itemid=73
[2] Bahr B and Dittrich B 2009 (Broken) Gauge Symmetries and Constraints in Regge Calculus Class. Quant. Grav. 26 225011. (Preprint arXiv:0905.1670 [grqc]).
[3] Bahr B, Dittrich B and Steinhaus S 2011 Perfect discretization of reparametrization invariant path integrals Phys. Rev. D83 105026. (Preprint arXiv:1101.4775 [grqc]).
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[7] Bahr B and Dittrich B 2009 Improved and Perfect Actions in Discrete Gravity Phys. Rev. D80 124030. (Preprint arXiv:0907.4323 [grqc]).
[8] Dittrich B, Eckert F C and MartinBenito M 2011 Coarse graining methods for spin net and spin foam models Preprint arXiv:1109.4927 [grqc].
[9] Dittrich B and Steinhaus S to appear