1. Seidl, F.G.P., Hughes, D.J., Palevsky, H., Levin, J.S., Kato, W.Y., Sjöstrand, N.G.: Phys. Rev. 95 (1954) 476. Exfor 11671.
2. Radkevich, I.A., Vladimirskij, V.V., Sokolovskij, V.V.: At. Energ. 1 (1956) 429; Sov. At. Energ. 1 (1956) 5. Exfor 40382.
3. Harvey, J.A., Block, R.C., Slaughter, G.G., Martin, W.J., Parker, G.W.: Proc. 2nd Int. Conf. on Peaceful Uses of Atomic Energy, Geneva, 1958, Report 673. Exfor 12012.
4. Slaughter, G.G., Block, R.C., Harvey, J.A.: Rep. ORNL-2501, 1958, p. 26. Exfor 11446.
5. Pattenden, N.J.: Nucl. Sci. Engin. 17 (1963) 371. Exfor 12025.