1. J.L. Wood, in Future Directions in Studies of Nuclei Far From Stability, eds. J.H. Hamilton, et al., North-Holland Publishing Co., Amsterdam (1980), p.37.
2. E.F. Zganjar, ibid., p.49.
3. Interacting Bose-Fermi Systems in Nuclei, ed. F. Iachello, Ettore Majorana International Science Series, Plenum Press, to be published.
4. A. Arima, T. Otsuka, F. Iachello and I. Talmi, Phys. Lett. 66B, 205 (1977).
5. O. Scholten, thesis, Univ. of Groningen (1980).