In: Computational Condensed Matter Physics; Lecture Manuscripts of the 37th Spring School of the Institute of Solid State Research: This Spring School was organized by the Instiute of Solid State Research in the Forschungszentrum Jülich on March 06-17, 2006 (Schriften des Forschungszentrums Jülich. Reihe Materie und Material/Matter and Materials; 32) / Blügel, Stefan; Gompper, Gerhard; Koch, Erik; Müller-Krumbhaar, Heiner; Spatschek, Robert; Winkler, Roland G. (Hrsg.). - Jülich: Forschungszentrum Jülich, Zentralbibliothek, Verlag, 2006, S. B13.1 - B13.19