Insightful Problem Solving in an Asian ElephantDOI: info:10.1371/journal.pone.0023251v. 6No. 8Public Library of Science1–7
Foerder, Preston, Galloway, Marie, Barthel, Tony C., Moore, Donald, and Reiss, Diana. 2011. "Insightful Problem Solving in an Asian Elephant." PLoS ONE, 6, (8) 1–7. https://doi.org/10.1371/journal.pone.0023251.