Nicholas H. Putnam, Thomas Butts, David E. K. Ferrier, Rebecca F. Furlong, Uffe Hellsten, Takeshi Kawashima, Marc Robinson-Rechavi, Eiichi Shoguchi, Astrid Terry, Jr-Kai Yu, E`lia Benito-Gutiérrez, Inna Dubchak, Jordi Garcia-Fernàndez, Jeremy J. Gibson-Brown, Igor V. Grigoriev, Amy C. Horton, Pieter J. de Jong, Jerzy Jurka, Vladimir V. Kapitonov, Yuji Kohara, Yoko Kuroki, Erika Lindquist, Susan Lucas, Kazutoyo Osoegawa, Len A. Pennacchio, Asaf A. Salamov, Yutaka Satou, Tatjana Sauka-Spengler, Jeremy Schmutz, Tadasu Shin-I, Atsushi Toyoda, Marianne Bronner-Fraser, Asao Fujiyama, Linda Z. Holland, Peter W. H. Holland, Nori Satoh, Daniel S. Rokhsar. The amphioxus genome and the evolution of the chordate karyotype. Nature. 2008/06, 453 (7198): 1064–1071 [2018-04-02]. ISSN 1476-4687. doi:10.1038/nature06967. (原始內容存檔於2021-03-08) (英語). 請檢查|date=中的日期值 (幫助)
Stach, T. G. (2004). Cephalochordata (Lancelets). In M. Hutchins, R. W. Garrison, V. Geist, P. V. Loiselle, N. Schlager, M. C. McDade, ...W. E. Duellman (Eds.), Grzimek's Animal Life Encyclopedia (2nd ed., Vol. 1, pp. 485–493). Detroit: Gale.