@article {126,
	title = {A QM/MM implementation of the self-consistent charge density functional tight binding (SCC-DFTB) method},
	journal = {J. Phys. Chem. B},
	volume = {105},
	year = {2001},
	pages = {569},
	author = {Cui, Q. and M. Elstner and E. Kaxiras and T. Frauenheim and M. Karplus}
}
