Lefebvre, Bertrand; Derstler, Kraig; Sumrall, Colin D. (2012). "A reinterpretation of the solutan Plasiacystis mobilis (Echinodermata) from the Middle Ordovician of Bohemia". Zoosymposia. 7: 287–306. doi:10.11646/zoosymposia.7.1.27.
Caster, Kenneth E. (1983). "A new Silurian carpoid echinoderm from Tasmania and a revision of the Allanicytidiidae". Alcheringa: An Australasian Journal of Palaeontology. 7 (4): 321–335. doi:10.1080/03115518308619615.