1. Bouillon, J.: Diagnoses préliminaires des trois hydroides de Roscoff. Trav. Stn biol. Roscoff (N.S.) 16, p. 54 (1965)
2. Brinckmann, A. and K.W. Petersen: On some distinguishing characters of Dipurena reesi Vannucci, 1956 and Cladonema radiatum Dujardin, 1843. Pubbl. Staz. zool. Napoli 31, 386?392 (1960)
3. Calder, D.R.: Hydroid and young medusa stages of Dipurena strangulata (Hydrozoa, Corynidae). Biol. Bull. mar. biol. Lab., Woods Hole 138, 109?114 (1970)
4. Forbes, E.: On the pulmograde medusae of the British seas. Ann. Mag. nat. Hist. (Ser. 1) 18, 284?287 (1846)
5. Haeckel, E.: Das System der Medusen. Erster Theil einer Monographie der Medusen, 360 pp., 20 pls. Jena: Gustav Fischer 1879