1. Groshev, L.V., Dvoretsky, V.N., Demidov, A.M., Panin, Yu.N., Lushchikov, V.I., Pokotilovsky, Yu.N., Strelkov, A.V., Shapiro, F.L.: Phys. Lett.34B, 293 (1971)
2. Egorov, A.I., Lobashov, V.M., Nazarenko, V.A., Porsev, G.D., Serebrov, A.P.: Sov. Phys.-J. Nucl. Phys.19, 147 (1974)
3. Lushchikov, V.I.: Proceedings of the International Conference on the Interaction of Neutrons with Nuclei, Lowell U.S.A., 1976. CONF 760715 P1, 118 (1976)
4. Shapiro, F.L.: Proceedings of the Conference on ?Nuclear Structure Studies with Neutrons?, Budapest, 1972; New York: Plenum Press 1975
5. Ignatovich, V.K., Satarov, L.M.: Communications of the Kurchatov Institute IAE-2820, Moscow (1977)