1. Integrated acoustic monitoring and control system for deep water installations;Sevaldsen,1987
2. N.S. Lidorjenko, V.A. Naumjenko, A.T. Kopjov, L.P. Esajanand and D.V. Kurygitsa, Russ. Patent No. SU-5 509 307 (1976).
3. Ø. Hasvold, Norweg. Patent No. 164 324 (1988).
4. Single cell seawater batteries;Walsh,1990
5. Seawater activated power source for long term missions;Lauer,1990