1. Poortmans, F., Ceulemans, H.: Nucl. Phys. A 97 (1970) 657. Exfor 20213.
2. Kvitek, J., Popov, Yu.P.: Nucl. Phys. A 154 (1970) 177. Exfor 40225 (1985).
3. Popov, Yu.P., Pshitula, M., Rumi, R.F., Stempinski, M., Florek, M., Furman, W.I.: Proc. 2nd IAEA Conf. on Nuclear Data for Reactors, Helsinki, 1970, Vol. 1, p. 669. IAEA, Vienna, 1970. Exfor 40225.
4. Cauvin, B., Lottin, A., Michaudon, A., Newstead, C., Paya, D., Trochon, J.: Proc. 3rd Conf. on Neutron Cross Sections for Technology, Knoxville, 1971, Vol. 2, p. 785. U.S. Atomic Energ. Comission, 1971. Exfor 20126.
5. Karzhavina, E.N., Popov, A.B.: Yad. Fiz. 15 (1972) 401; Sov. J. Nucl. Phys. 15 (1972) 225.