Phalen, D.N., Groombridge, J. (2003). Field research in Hanawi: A story about working with the world's most endangered bird. Journal of Avian Medicine and Surgery 17:39-42
Pukui, Mary Kawena & Elbert, Samuel H. (1986): Hawaiian Dictionary. University of Hawaiʻi Press, Honolulu.ISBN 0-8248-0703-0
VanderWerf, Eric A.; Groombridge, Jim J.; Fretz, J. Scott & Swinnerton, Kirsty J. (2006): Decision analysis to guide recovery of the po‘ouli [sic], a critically endangered Hawaiian honeycreeper. Biological Conservation 129: 383-392.doi:10.1016/j.biocon.2005.11.005 (HTML abstract)
