A.  Makra and Keegan, B. F., ?Arm regeneration in Acrocnidabrachiata (Ophiuroidea) at Little Killary, west coast of Ireland?, Biology and Environment: Proceedings of the Royal Irish Academy, vol. 99B, pp. 95-102, 1999.

G.  Hendler, Grygier, M. J., Maldonado, E., and Denton, J., ?Babysitting brittle stars: heterospecific symbiosis between ophiuroids (Echinodermata)?, Invertebrate Biology, vol. 118, pp. 190?201, 1999.