M. P. Braun, “A molecular phylogeny of the genus Psittacula sensu lato (Aves: Psittaciformes: Psittacidae: Psittacula, Psittinus, Tanygnathus, †Mascarinus) with taxonomic implications ”, Zootaxa, vol. 4563, no. 3, pp. 547–562, Mar. 2019.