1. Bainbridge, V.: Continuous plankton records: contribution towards a plankton atlas of the north Atlantic and the North Sea. Part VIII. Chaetognatha. Bull. mar. Ecol. 6, 40?51 (1963)
2. Corbin, P. G.: The spawning of mackerel, Scomber scombrus L., and pilchard, Clupa pilchardus Walbaum, in the Celtic Sea in 1937?39 with observations on the zooplankton indicator species Sagitta and Muggiaea. J. mar. biol. Ass. U.K. 27, 65?132 (1947)
3. Dallot, S.: La reproduction du Chaetognatha planktonique Sagitta setosa Müller en été dans la rade de Villefranche. C. r. hebd. Séanc. Acad. Sci., Paris 264, 972?974 (1967)
4. Dallot, S.: Observations préliminaires sur la reproduction en élevage du chaetognathe planctonique Sagitta setosa Müller. Rapp. P.-v. Réun. Commn int. Explor. scient. Mer Méditerr. 19, 521?523 (1968)
5. Fraser, J. H.: The Chaetognatha and other zooplankton of the Scottish area and their value as biological indicators of hydrographical conditions. Mar. Res. 2, 1?52 (1952)