@article {6380,
	title = {Bragg spectroscopy of a superfluid Bose-Hubbard gas},
	journal = {New Journal of Physics},
	year = {2010},
	doi = {10.1088/1367-2630/12/8/083025},
	author = {X. Du and Shoupu Wan and Emek Yesilada and C. Ryu and D.J. Heinzen and Zhaoxin Liang and Biao Wu}
}
