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2. J.C. Street and E.C. Stevenson, ‘Washington Meeting’, April 29, 1937.
3. A more detailed account of the discovery of the muon is given in the review article by H.-J. Gerber, ‘Lepton Properties’, Proceedings of the International Europhysics Conference on High Energy Physics, July 1987.
4. H. Yukawa, Proc. Phys. Math. Soc. Jpn.17 (1935) 48.
5. P. Kunze, Z. Phys.83 (1933) 1.