References
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- Johanessen, W.H., 1993: Species of the Silurian operculate coral genus Goniophyllum. Geologiska Föreningens i Stockholm Förhandlingar 115, pp. 119–143, 19 figs.
- Johannessen, W.H., 1997: Silurian dissepimentate cystiphyllid rugose corals from Baltoscandia. Preface, Dr. scient. thesis in palaeontology/historical geology, Geological Institute, University of Bergen. 33 pp, 9 figs.
- Lindström, G., 1883: Om de Palæozoiska formationernas Operkelbärande Koraller. Bihang till Kungliga Svenska Vetenskaps-Akademiens Handlingar 7 (4), 1–112.
- Neuman, B., 1982: : Early Silurian rugose corals of the Oslo region: a preliminary report. Palaeontological Contribution from the University of Oslo 278, 33–42.