1. M. Goldhaber, L. Grodzins, and A.W. Sunyar, Phys. Rev. 109 (1958) 1015.
2. M.T. Burgy, V.E. Krohn, T.B. Novey, G.R. Ringo, and V.L. Telegdi, Phys. Rev. 110 (1958) 1214. See also a remark at the end of Ref. 1.
3. See e.g., B.W. Ridley, Prog. Nucl. Phys. 5 (1956) 188. This article concludes “Little can be said about the structure of the ß-decay interaction with certainty, except that it is most probably S and T.”
4. L.A. Page, Nuovo Cimento 7 (1957) 727, March 1, 1957 proposed the same ideas independently but did not specify the spin sequence.
5. L. Grenâcs et al., Am. J. Phys. 50 (1982) 931.