Theory of Spin Lattices and Lattice Gauge Models Proceedings of the 165th WE-Heraeus-Seminar Held at Physikzentrum Bad Honnef, Germany, 14-16 October 1996 - Clark, John W.; Clark, John W.; Ristig, Manfred L.; Ristig, Manfred L. (Springer Berlin Heidelberg : Imprint: Springer, 1997)