1. P. Hasenfratz, J. Nager, in: Nonperturbative methods in quantum field theory. Z. Horvath et al. (eds.), p. 89, Siófok 1986. Singapore: World Scientific 1987; P. Hasenfratz: Selected topics in lattice gauge theories, in: Proceedings of the 32nd Scottish Universities Summer School in Physics, St. Andrews, 1987
2. W. Langguth, I. Montvay: DESY-preprint-87/020; A. Hasenfratz, T. Neuhaus: Nucl. Phys. B297 (1988) 205; A. Hasenfratz et al.: Tallahassee preprint FSU-SCRI-87/52: J. Kuti, Yue Shen: University of California San Diego preprint UCSD/PTH-87/14; J. Kuti: Talk at the Lattice Gauge Theory Meeting, Seillac (1987);
3. M. Lüscher, P. Weisz: DESY preprints 87/017 and 87/075 1987
4. R. Dashen, H. Neuberger: Phys. Rev. Lett. 50 (1983) 1897
5. M. Lindner: Z. Phys. C — Particles and Fields 31 (1986) 295