Deheyn, D.; Eeckhaut, I.; Moens, J. (1998). A new species of polyclad (Plathelminthes), endosymbiont of the ophiuroid Ophiothrix purpurera, in: Mooi, R. et al. (Ed.) Echinoderms: San Francisco: Proceedings of the Ninth International Echinoderm Conference, San Francisco, California, USA, 5-9 August, 1996. pp. 347-350, more