1. Chun, C. Wiss. Ergebn. dt. Tiefsee-Exp. “Valdivia” 18 (Translated by the Israel Program for Scientific Translation, Jerusalem, 1975).
2. Roper, C. F. E. & Young, R. E. Smithson. Contrib. Zool. No. 209 (1975).
3. Voss, G. L. Stud. Trop. Oceanogr. Inst. Mar. Sci. Univ. Miami 5, 511–535 (1967).
4. Jahn, W. Nature 232, 487–488 (1971).
5. Roper, C. F. E. & Brundage, W. L. Smithson. Contrib. Zool. No. 121 (1972).