Budelmann, Bernd U., Theodore H. Bullock, and Roddy Williamson. "Cephalopod brains: promising preparations for brain physiology." Cephalopod Neurobiology: Neuroscience Studies in Squid, Octopus and Cuttlefish. : Oxford University Press, 1995-04-27. Oxford Scholarship Online. 2012-03-22. Date Accessed 20 Jun. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198547907.001.0001/acprof-9780198547907-chapter-24>.
Budelmann, B., Bullock, T., & Williamson, R.(1995-04-27). Cephalopod brains: promising preparations for brain physiology. In Cephalopod Neurobiology: Neuroscience Studies in Squid, Octopus and Cuttlefish. : Oxford University Press. Retrieved 20 Jun. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198547907.001.0001/acprof-9780198547907-chapter-24.
Budelmann, Bernd U., Theodore H. Bullock, and Roddy Williamson. "Cephalopod brains: promising preparations for brain physiology." In Cephalopod Neurobiology: Neuroscience Studies in Squid, Octopus and Cuttlefish. : Oxford University Press, 1995-04-27. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198547907.001.0001/acprof-9780198547907-chapter-24.
Budelmann BU, Bullock TH, Williamson R. Cephalopod brains: promising preparations for brain physiology. In: Abbott NJ, Williamson R, Maddock L. Cephalopod Neurobiology: Neuroscience Studies in Squid, Octopus and Cuttlefish. Oxford University Press; 1995. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198547907.001.0001/acprof-9780198547907-chapter-24. Accessed June 20, 2013.