Pierrot-Bults, A.C.; Chidgey, K.C. (1988). Chaetognatha: keys and notes for the identification of the species. <i>Synopses of the British fauna (new series)</i>, 39. E.J. Brill; W. Backhuys: Leiden, The Netherlands. ISBN 90-04-08610-2. vii, 66 pp. (look up in IMIS) [details]