Cornelius, P. F. S. (1995). North-west European thecate hydroids and their medusae: Keys and notes for identification of the species. Shrewsbury [England]: Published for the Linnean Society of London and the Estuarine and Coastal Services Association by Field Studies Council.

Cornelius, Paul F. S. North-west European Thecate Hydroids and Their Medusae: Keys and Notes for Identification of the Species. Shrewsbury [England]: Published for the Linnean Society of London and the Estuarine and Coastal Services Association by Field Studies Council, 1995.

Cornelius, Paul F. S. North-west European Thecate Hydroids and Their Medusae: Keys and Notes for Identification of the Species. Shrewsbury [England]: Published for the Linnean Society of London and the Estuarine and Coastal Services Association by Field Studies Council, 1995.