@article {9840,
	title = {Photon assisted transport in superlattices beyond the nearest-neighbor approximation},
	journal = {Physical Review B - Condensed Matter and Materials Physics},
	year = {1997},
	pages = {3976-3981},
	author = {Xian-Geng Zhao and G.A. Georgakis and Qian Niu}
}
