1. Leonard Jr., B.R., Odegaarden, R.H.: J. Bull. Am. Phys. Soc. 6 (1961) 8.
2. Patterson, J.R., Harvey, J.A.: Rept. ORNL–3268, 1962, p. 47. Exfor 12269.
3. Simpson, F.B., Burgus, W.H., Evahs, J.E., Kibby, H.W.: Nucl. Sci. Engin. 12 (1962) 243. Exfor 12265.
4. Sicre, A., Caitucolli, F., Barreau, G., Doan, T.P., Benfoughal, T., Leroux, B.: Proc. Int. Symp. Phys. and Chem. of Fission, Jülich, 1979. vol. 1, p. 186. IAEA-SM-241/B5.
5. Hussein, A.Z., Harvey, J.A., Hill, N.W., Patterson, J.R.: Nucl. Sci. Engin. 78 (1981) 370. Exfor 10959.