David A. Ebert, Marc Dando, Sarah Fowler: A Pocket Guide to Sharks of the World, s. 62. Princeton University Press, 2021. ISBN 978-0-691-21874-8Kirja Googlen teoshaussa Viitattu 25.6.2022. (englanniksi)
David A. Ebert, Marc Dando: Field Guide to Sharks, Rays & Chimaeras of Europe and the Mediterranean, s. 218. Princeton University Press, 2021. ISBN 978-0-691-20598-4Kirja Googlen teoshaussa Viitattu 25.6.2022. (englanniksi)
Finucci, B., Cheok, J., Cotton, C.F., Kulka, D.W., Neat, F.C., Pacoureau, N., Rigby, C.L., Tanaka, S. & Walker, T.I.: Deania calceaIUCN Red List of Threatened Species. Version 2021-3. 2020. International Union for Conservation of Nature, IUCN, Iucnredlist.org. Viitattu 25.6.2022. (englanniksi)
si.edu
biogeodb.stri.si.edu
Species: Deania calcea, Birdbeak dogfish sharkShorefishes of the Greater Caribbean online information system. Smithsonian Tropical Research Institute. Viitattu 25.6.2022. (englanniksi)