1. See, for example, Rowe, D.J.: Nuclear Collective Motion. New York, London, Toronto: Methuen and Co. 1970
2. Kurath, D.: Phys. Rev.130, 1525 (1963)
3. Hanna, S.S.: In: Isospin in Nuclear Physics, ed. by Wilkinson, D.H. (ed.). Amsterdam: North-Holland Publishing Co. 1969;
4. Hanna, S.S.: In: Photonuclear Reactions I. Lecture Notes in Physics. Costa, S., Schaerf, C. (eds.), Vol. 61. Berlin, Heidelberg, New York: Springer-Verlag 1977
5. Fagg, L.W.: Rev. Mod. Phys.47, 683 (1975)