Detailed coverage of invasive species threatening livelihoods and the environment worldwide
Jones, G. E., Cregg, B. M., (2006). HortScience 41(1), 143-148. American Society for Horticultural Science, Alexandria, USA. English language
Teng, S. C., (1947). Botanical Bulletin of Academia Sinica, Taipei 1(3), 221-42. English language