References
- Choi YJ, Lee CH, Rho S, Lee YD. 2004. Reproductive cycle and spawning rhythm of the ascidian, Halocynthia hilgendorfi ritteri. Korean J Biol Sci. 8(1):33–40.
- Choi YJ, Kim SY, Lee CH, Rho S, Lee YD. 2004. Early development of the ascidian (Halocynthia hilgendorfi ritteti). Korean J Fish Aquat Sci. 37(2):98–104.
- Oka A. 1906. Notizen uber japanische Ascidien I. Annot Zool Japon. 6:37–52.
- Tokioka T. 1959. Contributions to Japanese ascidian fauna – XIII. Sporadic memoranda (4). Publ Smbl. 7(2):237–239.