melia, L. Smolin, Prospects for constraining quantum gravity dispersion with near term observations, arXiv:0906.3731, Phys.Rev.D80:084017,2009. [5] R. Schtzhold, W. G. Unruh, Large-scale non-locality in "doubly special relativity" with an energy-dependent speed of light, arXiv:gr-qc/0308049v2, JETP Lett. 78