S. Grosser, C. P. Burridge, A. J. Peucker, J. M. Waters: Coalescent Modelling Suggests Recent Secondary-Contact of Cryptic Penguin Species. In: PLoS ONE. 10 (12), 2015, S. e0144966; doi:10.1371/journal.pone.0144966
E. S. Tavares, A. J. Baker: Single mitochondrial gene barcodes reliably identify sister-species in diverse clades of birds. In: BMC Evol Biol. 8, 2008. doi:10.1186/471-2148-8-81.
Daniel B. Thomas, Alan J.D. Tennyson, Felix G. Marx and Daniel T. Ksepka. 2023. Pliocene Fossils support A New Zealand Origin for the Smallest Extant Penguins. Journal of Paleontology. First View, 1 - 11. DOI: 10.1017/jpa.2023.30
