title: EMPIRE: a highly parallel semiempirical molecular orbital program: 1: self-consistent field calculations.
authors.affiliation: Computer-Chemie-Centrum der Friedrich-Alexander-Universität Erlangen-Nürnberg, Nägelsbachstraße 25, 91052, Erlangen, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Hennemann
authors.forename: Timothy
authors.initials: T
authors.lastname: Clark