1Green, W M, de Billot, M C, Joffe, T,van Staden, L,Bennett-Nel, A,du Toit, C L N and van der Westhuizen, L. 2001. Indigenous plants and weeds on the Makhathini flats as refuge hosts to maintain bollworm population susceptibility to transgenic cotton (Bollgard^TM). http://www. monsanto. de/biotechnologie/publikationen/Green_et_al_article_2001, pdf.
2Guglielmone, H A , Agnese, A M , Montoya, N S C and Cabrera, J L. 2002. Anticoagulant effect and action mechanism of sulphated flavonoids from Flaveria bidentis.Thrombosis Research, 105:183-188.
3Kubien, D S,von Caemmerer, S , Furbank, R T and Sage, R F. 2003. C4 photosynthesis at low temperature: a study using transgenic plants with reduced amounts of rubisco. Plant Physiology, 132: 1577- 1585.
4Lai, L B,Wang, L and conserved functions forNelson T M. 2002. Distinct buttwo chloroplastic NADP-malic enzyme isoforms in C3 and C4 Flaveria species. Plant Physiology, 128:125-139.
5Mauchamp, A. 1997. Threats from alien plant species in the Galápagos Islands. Conservation Biology, 11:260-263.
6Powell, A M. 1978. Systematics of Flaveria (Flaveriinae-Asteraceae). Annals of the Missouri Botanical Garden, 65: 590 - 636.
7Randall, R P. 2002. A Global Compendium of Weeds. R . G . & F.J. Richardson, Melbourne.
8Tye, A. 2004. Invasive plant problems and requirements for weed risk assessment in the Galápagos Islands. http:// www. hear. org/iwraw/1999/papers/tyefinal. pdf.
9Xie, Y,Li, Z, Gregg, W P and Li, D. 2000. Invasive species in China - an overview. Biodiversity and Conservation, 10:1317-1341.
10Agnese, A M , Ntifiez-Montoya, S , Ariza-Espinar, L and Cabrera, J. L. 1999. Chemotaxonomic Features in Argentinian Species of FIaveria (Compositae). Biochemical Systematics and Ecology, 27:739 -742.