Sabalones, J. & Walters, H. & Bohorquez Rueda, C.A. (2004)
Chapter 13: Learning and Behavioral Enrichment in Elasmobranchs.
In M. Smith, D. Warmolts, D. Thoney, & R. Hueter (Eds.), The Elasmobranch Husbandry Manual: Captive Care of Sharks, Rays and their Relatives (pp. 169–182). Special Publication of the Ohio Biological Survey