@article {85,
	title = {Theory of adsorption and desorption of H_2 molecules on the Si(111)-(7 x 7) surface},
	journal = {Phys. Rev. Lett.},
	volume = {79},
	year = {1997},
	pages = {5078},
	author = {K. Cho and E. Kaxiras and J.D. Joannopoulos}
}
