Ribot, R. F. H., Buchanan, K. L., Endler, J. A., Joseph, L., Bennett, A. T. D., & Berg, M. L. (2012). Learned vocal variation is associated with abrupt cryptic genetic change in a parrot species complex. Public Library of Science (PLoS).

Ribot, Raoul F H., Katherine L. Buchanan, John A. Endler, Leo Joseph, Andrew T D. Bennett, ja Mathew L. Berg. Learned Vocal Variation Is Associated With Abrupt Cryptic Genetic Change in a Parrot Species Complex. Public Library of Science (PLoS), 2012.

Ribot, Raoul F H., et al. Learned Vocal Variation Is Associated With Abrupt Cryptic Genetic Change in a Parrot Species Complex. Public Library of Science (PLoS), 2012.