1. A. Losev, G. Moore, N. Nekrasov and S. Shatashvili, Four-Dimensional Avatars of 2D RCFT, hep-th/9509151.
2. A. Losev, G. Moore, N. Nekrasov and S. Shatashvili, Central Extensions of Gauge Groups Revisited, hep-th/9511185.
3. Further results appear in N. Nekrasov, Ph.D. Thesis.
4. Non-abelian bosonization in two dimensions
5. GAUGE TRANSFORMATIONS AND DIFFEOMORPHISMS