Kundu, S.; Jones, C. G.; Prys-Jones, R. P.; Groombridge, J. J. (2011). The evolution of the Indian Ocean parrots (Psittaciformes): Extinction, adaptive radiation and eustacy. Molecular Phylogenetics and Evolution 62 (1): 296–305. doi:10.1016/j.ympev.2011.09.025. PMID 22019932