1. J.H. Hamilton, A.V. Ramayya and L.C. Whitlock, Phys. Rev. Lett. 22 (1969) 65.
2. L.L. Riedinger, N.R. Johnson and J.H. Hamilton, Phys. Rev. Lett. 19 (1967) 1243.
3. I.A. Fraser et al., Phys. Rev. Lett. 23 (1969) 1047, 1051.
4. K. Kumar, in Proc. of the Conf. on Properties of Nuclei far from the region of β-stability, Leysin, Switzerland (1970).
5. J.H. Hamilton, in Proc. of Int. Conf. on Angular Correlations in Nuclear Disintegrations, Delft, The Netherlands, August 1970, p. 181. (see the references cited there for the individual measurements).