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Hinkle, Anya E. (May 2007). "Population structure of Pacific Cordyline fruticosa (Laxmanniaceae) with implications for human settlement of Polynesia". American Journal of Botany. 94 (5): 828–839. doi:10.3732/ajb.94.5.828. PMID21636452.
Keesing, Roger M. (September 2012). "On not understanding symbols". HAU: Journal of Ethnographic Theory. 2 (2): 406–430. doi:10.14318/hau2.2.023. S2CID143871873.
Harvest Rituals in Hapao(PDF). Social Practices, Rituals and Festive Events. International Information and Networking Centre for Intangible Cultural Heritage in the Asia-Pacific Region under the auspices of UNESCO (ICHCAP). Archived from the original(PDF) on 2018-09-09. Retrieved 2019-01-21.