Tài liệu tham khảo WikiPedia: Etaballia http://www.sciencedirect.com/science/article/pii/S... //pubmed.ncbi.nlm.nih.gov/11250829 http://www.amjbot.org/content/88/3/503.abstract //doi.org/10.1016%2Fj.sajb.2013.05.001
