ZHANG, Q.-L. et al. A Phylogenomic Framework and Divergence History of Cephalochordata Amphioxus. Front. Physiol., 18 December 2018 Sec. Systems Biology Archive, Volume 9 - 2018 [1]
google.sk
books.google.sk
GIRIBET, Gonzalo; EDGECOMBE, Gregory D.. The Invertebrate Tree of Life. [s.l.] : Princeton University Press, 2020. 608 s. Dostupné online.ISBN 978-0-691-17025-1. S. 152.
GILL, T. Note on the Leptocardians. In: Proceedings of the United States National Museum. 5 (307):515–516 1883 [3]
taxonomy.nl
taxonomicon.taxonomy.nl
Brands, S.J. (ed.), 2022. Cephalochordata. In Systema Naturae 2000. The Taxonomicon, 4 Aug 2022. Universal Taxonomic Services, Zwaag, The Netherlands. [4]. Access date: 14 Feb. 2023