1. Harvey, J.A., Hughes, D.J., Carter, R.S., Pilcher, V.E.: Phys. Rev. 99 (1955) 10. Exfor 11912.
2. Block, R.C., Russell, J.E., Hockenbury, R.W.: Rept. ORNL–3425, 1963, p. 64, Oak Ridge, 1963, Exfor 12687.
3. Fuketa, T., Harvey, J.A.: Rept. ORNL–3778, 1965, p. 38. Exfor 11372.
4. Fuketa, T., Russell, J.E., Hockenbury, R.W.: Progr. Rept. RPI-328-68, p. 58, 1966. Exfor 12686.
5. Moxon, M.S., Jolly, J.E., Endacott, D.A.J.: Rept. AERE–PR/NP - 21, p. 41, Harwell, 1974. Exfor 20689.