1. J. J. Aubert et al.: Phys. Rev. Lett.33, 1404 (1974); J. E. Augustin et al.: Phys. Rev. Lett.33, 1406 (1974)
2. Brief reviews may be found in the reports by G. Altarelli: In: Proceedings of the XIX International Conference on High Energy Physics, Tokyo, 1978, S. Homma, M. Kawaguchi, H. Miyazawa (eds.), (Physical Society of Japan, Tokyo, 1979), p. 411; and by J. D. Jackson, C. Quigg, J. L. Rosner: In: Proceedings of the XIX International Conference on High Energy Physics, Tokyo, 1978, S. Homma, M. Kawaguchi, H. Miyazawa (eds.), (Physical Society of Japan, Tokyo, 1979), p. 391. Many issues now current were raised in M. K. Gaillard, B. W. Lee, J. L. Rosner: Rev. Mod. Phys.47, 277 (1975)
3. Recent analyses of neutrino-induced dimuons have been reported by R. Odorico, V. Roberto: Nucl. Phys. B136, 333 (1978); C. H. Lai: Phys. Rev. D18, 1422 (1978)
4. S. W. Herb et al.: Phys. Rev. Lett.39, 252 (1977)
5. M. L. Perl et al.: Phys. Lett.63B, 466 (1976)