Literature
- Kirkpatrick, P.A. and P.R. Pugh 1984. Siphonophores and Velellids. Synopses of the British Fauna (New Series), No. 29. Brill/Backhuys, London.
- Lameere, A. 1912. Un Siphonophore en Belgique. Ann. Soc. roy. zool. malac. Belg., 47: 119-120.
- Wilson, D.P. 1947. The Portuguese man-of-war, Physalia physalis L., in the British and adjacent seas. J. mar. biol. Ass. U.K., 27(10): 139-172.