Theodore Roosevelt, Gerald Handerson Thayer, Abbott Handerson Thayer: Revealing and concealing coloration in birds and mammals. Bulletin of the AMNH ; v. 30, article 8. 1911 (amnh.org [abgerufen am 22. November 2021]).
lrb.co.uk
Patrick Wright: Cubist Slugs. In: London Review of Books. Band27, Nr.12, 23. Juni 2005, ISSN0260-9592 (lrb.co.uk [abgerufen am 22. November 2021]).