Quantum Aspects of Gauge Theories, Supersymmetry and Unification Proceedings of the Second International Conference Held in Corfu, Greece, 20-26 September 1998 - Ceresole, A.; Ceresole, A.; Kounnas, C.; Kounnas, C.; Lüst, D.; Lüst, D.; Theisen, S.; Theisen, S. (Springer Berlin Heidelberg : Imprint: Springer, 1999)