1. Blatt J., Weisskopf V. F., Theoretical Nuclear Physics, John Wiley, New York 1952, p. 293.
2. Hauge P. S., Williams S. A., Duffey G. H., Phys. Rev.C 4 (1971), 1044.
3. Brink D., Proc. Int. School of Physics “Enrico Fermi”, Course 36, Academic Press, New York, 1966, p. 247.
4. Wilkinson D. H., Proc. Rutherford Jubilee Int. Conf., Manchester, ed. J. Birks, Heywood, London 1961, p. 339.
5. McCarthy I., Introduction to Nuclear Theory, John Wiley, New York 1968, p. 217.