Feenstra, Kathleen R./Clements, David R. 2008. Biology and impacts of Pacific island invasive species. 4. Verbesina encelioides, golden crownbeard (Magnoliopsida: Asteraceae). Pacific Science (2008) 62 (2):161-176
Online details: http://www.nicholas.duke.edu/hawaii/readings/Pac.%20Sci.%202008%20Feenstra.pdf