1. Magnetic monopoles in unified gauge theories
2. E. Tombolis and G. Woo, M.I.T. preprint CTP 512; P. Hasenfratz and D. Ross, Utrecht preprint. Monopole quantization has also been discussed using the axial gauge by N. Christ, A. Guth, E. Weinberg of Columbia University, N. Christ, A. Guth, E. Weinberg of Columbia University, private communication.