@article {65,
	title = {Free energy of the concerted-exchange mechanism for self-diffusion in silicon},
	journal = {Phys. Rev. B},
	volume = {53},
	year = {1996},
	pages = {1310},
	author = {A. Antonelli and S. Ismail-Beigi and E. Kaxiras and K.C. Pandey}
}
