1. J.P. Blaser, F. Boehm, P. Marmier, P. Scherrer, Helv. Phys. Acta 24, 441 (1951)
2. R.D. Albert, Phys. Rev. 115, 925 (1959)
3. C.H. Johnson, A. Galonsky, C.N. Inskeep, Cross sections for $(\ab{p},\ab{n})$ reactions in intermediate-weight nuclei, Progress Report, Oak Ridge National Laboratory, ORNL-2910 (1960) p. 25
4. P.V. Harper, K. Lathrop, J.L. Need, Nucl. Sci. Abstr. 15, 2780, 21516 (1961)
5. L.F. Hansen, R.D. Albert, Phys. Rev. 128, 291 (1962)