@article {171,
	title = {Negative differential resistance in transport throughorganic molecules on silicon},
	journal = {Phys. Rev. Lett.},
	volume = {98},
	year = {2007},
	pages = {066807},
	author = {S.Y. Quek and J.B. Neaton and M.S. Hybertsen and E. Kaxiras and S.G. Louie}
}
