1. Dzhelepov, B.S., Dimitriev, A.G., Zhelev, Z., Zhukovskii, N.N., Moskvin, L.N., Fominykh, V.I.: Bull. Acad. Sci. USSR, Phys. Ser.34, 1838 (1971)
2. Passoja, A., Vergnes, M., Kantele, J., Luontama, M.: JYFL-RR-16/82 (1982);
3. JYFL Annu. Rep. 1981, 47 (1982)
4. Singh, B., Viggars, A.: Nucl. Data Sheets42, 233 (1984)
5. Fazzini, T., Giannatiempo, A., Sona, P.: Nucl. Instrum. Methods211, 125 (1983)