- Nomenclator Zoologicus: A list of the names of the genera and subgenera in zoology from the tenth edition of Linnaeus 1758 to the end of 2004.
- KU’s ichnology website includes images and descriptions of trace fossils, videos of modern tracemaking animals, animations and anaglyphs, a bibliography, links to other pages, and much more! http://ichnology.ku.edu/
- Pollerspöck, J. 2014, Bibliography database of living/fossil sharks, rays and chimaeras (Chondrichtyes: Elasmobranchii, Holocephali), www.shark-references.com, World Wide Web electronic publication, Version 2014