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G.I. Gomero, M.J. Rebouças & R. Tavakol, *Class. Quantum Grav.* [**18**]{}, 4461–4476 (2001).\
G.I. Gomero, M.J. Rebouças & R. Tavakol, *Class. Quantum Grav.* [**18**]{}, L145–L150 (2001).\
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J.R. Weeks, *Detecting topology in a nearly flat hyperbolic universe*, astro-ph/0212006 (2002).

G.I. Gomero & M.J. Rebouças, *Phys. Lett. A* [**311**]{}, 319–330 (2003).

B.F. Roukema & A. Edge, *Mon. Not. R. Astron. Soc.* [292]{}, 105–112 (1997).

A. Bernui & G.I. Gomero, *Local Noise Correlations in Cosmic Topology*, in preparation.

G.I. Gomero, *Int. J. Mod. Phys. A* [**17**]{}, 