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Hourahine, B. and Sanna, S. and Aradi, B. and Köhler, C. and Niehaus, Thomas A. and Frauenheim, Th. (2007) Self-Interaction and Strong Correlation in DFTB. J. Phys. Chem. A 111, p. 5671.
Frauenheim, Th. and Seifert, G. and Elstner, M. and Niehaus, Thomas A. and Köhler, C. and Amkreutz, M. and Sternberg, M. and Hajnal, Z. and Di Carlo, A. and Suhai, S. (2002) Atomistic simulations of complex materials: ground-state and excited-state properties. J. Phys.: Condens. Matter 14, p. 3015.