J. Luminet, J. Weeks, A. Riazuelo, R. Lehoucq, and J. Uzan. (2003)cite arxiv:astro-ph/0310253Comment: 10 pages, 4 figures. This is a slightly longer version of the paper published in Nature 425, p. 593, 2003.
B. Roukema, Z. Bulinski, A. Szaniewska, and N. Gaudin. (2008)cite arxiv:0801.0006Comment: 20 pages, 22 figures, accepted in Astronomy & Astrophysics, software available at http://adjani.astro.umk.pl/GPLdownload/dodec/ and MCMCs at http://adjani.astro.umk.pl/GPLdownload/MCMC.