D. Baumann, and H. Peiris. (2008)cite arxiv:0810.3022
Comment: 18 pages, 12 figures. Invited review to appear in Advanced Science
Letters Special Issue on Quantum Gravity, Cosmology and Black Holes.
W. Zimdahl. (2008)cite arxiv:0812.2292
Comment: 4 pages, to appear in the Proceedings of the Spanish Relativity
Meeting ERE2008 in Salamanca, September 2008.