Beth Slikas, Storrs L. Olson, Robert C. Fleischer: Rapid, independent evolution of flightlessness in four species of Pacific Island rails (Rallidae): an analysis based on mitochondrial sequence data. In: Journal of Avian Biology 33 (1), 2002, S. 5–14. doi:10.1034/j.1600-048X.2002.330103.x.