1. A. Bohr, B.R. Mottelson, Nuclear Structure, Vol. II (W.A. Benjamin Inc., New York, 1975)
2. L. Weaver, R.Y. Cusson, L.C. Biedenharn, Ann. Phys. (N.Y.) 77, 250 (1973)
3. D.J. Rowe, Rep. Prog. Phys. 48, 1419 (1985)
4. V.V. Vanagas, Methods of the theory of group representations and separation of collective degrees of freedom in the nucleus, in Lecture notes at the Moscow Engineering Physics Institute (MIFI, Moscow, 1974) (in Russian)
5. V. Vanagas, Fiz. Elem. Chastits At. Yadra. 7, 309 (1976) (Sov. J. Part. Nucl. 7