Klump, B. C., J. M. Martin, S. Wild, J. K. Hörsch, R. E. Major, and L. M. Aplin,
"Innovation and geographic spread of a complex foraging culture in an urban parrot",
ScienceScience, vol. 373, issue 6553: American Association for the Advancement of Science, pp. 456 - 460, 2021.