@article {9827,
	title = {Atomic Landau-Zener tunneling and Wannier-Stark ladders in optical potentials},
	journal = {Physical Review Letters},
	year = {1996},
	pages = {4504-4507},
	author = {Qian Niu and Xian-Geng Zhao and G.A. Georgakis and M.G. Raizen}
}
