1. Combination of Proton and Neutron
2. Beta- and Gamma-Ray Spectroscopy;Siegbahn,1955
3. Proceedings International Conference on the Neutron Interactions with the Nucleus (U.S.A.E.C. Report TID-7547, 1957) p. 252.
4. Nuclear Spectroscopy, Part A;Ajzenberg-Selove,1960