1. 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.
2. Codding Jr, J.W., Tromp, R.L., Simpson, F.B.: Nucl. Sci. Engin. 43 (1971) 58. Exfor 10114.
3. Kirouac, G.J., Eiland, H.M., Conrad, C.A., Slovacek, R.E., Seeman, K.W.: Nucl. Sci. Engin. 52 (1973) 310. Exfor 10258.
4. Belanova, T.S., Zamyatnin, Yu.S., Kocherygin, N.G., Ivanenko, V.V., Anufriev, V.A., Kolesov, A.G., Poruchikov, V.A., Kalebin, S.M., Ivanov, R.N., Artamonov, V.S.: Proc. 3rd All-Union Conf. on Neutron Physics, Kiev, 1975, Vol. 3, p. 205. Moscow, 1976. Exfor 40371.
5. Anufriev, V.A., Belanova, T.S., Zamyatnin, Yu.S., Kolesov, A.G., Nikolskij, S.N., Poruchikov, V.A., Kalebin, S.M., Artamonov, V.S., Ivanov, R.N.: At. Energ. 45 (1978) 453; Sov. J. At. Energ. 45 (1979) 1189. Exfor 40524.