Joseph, L., Dolman, G., Donnellan, S., Saint, K. M., Berg, M. L., & Bennett, A. T. (2008). Where and when does a ring start and end? Testing the ring-species hypothesis in a species complex of Australian parrots. The Royal Society.

Joseph, Leo, Gaynor Dolman, Stephen Donnellan, Kathleen M. Saint, Mathew L. Berg, et Andrew T.D Bennett. Where and When Does a Ring Start and End? Testing the Ring-species Hypothesis in a Species Complex of Australian Parrots. The Royal Society, 2008.

Joseph, Leo, et al. Where and When Does a Ring Start and End? Testing the Ring-species Hypothesis in a Species Complex of Australian Parrots. The Royal Society, 2008.