title: EMPIRE: a highly parallel semiempirical molecular orbital program: 2: periodic boundary conditions.
authors.affiliation: Computer-Chemie-Centrum and Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nägelsbachstraße 25, 91052, Erlangen, Germany.
authors.forename: Johannes T
authors.initials: JT
authors.lastname: Margraf
authors.forename: Matthias
authors.initials: M
authors.lastname: Hennemann
authors.forename: Bernd
authors.initials: B
authors.lastname: Meyer
authors.forename: Timothy
authors.initials: T
authors.lastname: Clark