1. Die Neuen Dinosaurierfinde in der Oberkreide Canadas;Abel;Naturwissenschaften,1924
2. Allen, C., Bekoff, M. and Lauder, G. eds. (1998) Nature's Purposes: Analyses of Function and Design in Biology (Cambridge, MA: MIT Press).
3. Bakker, R. T. (1986) The Dinosaur Heresies (London: Longman Science and Technical Publishing).
4. Benton, M. J. (1990a) Vertebrate Paleontology (London: Unwin Hyman).
5. Scientific Methodologies in Collision: The History of the Study of the Extinction of the Dinosaurs;Benton;Evolutionary Biology,1990