@article {Shao:2009bv,
	title = {Lorentz violation from cosmological objects with very high energy photon emissions},
	journal = {Astropart. Phys.},
	volume = {33},
	year = {2010},
	pages = {312{\textendash}315},
	doi = {10.1016/j.astropartphys.2010.03.003},
	author = {Shao, Lijing and Xiao, Zhi and Ma, Bo-Qiang}
}
