Regan, T. J., McCarthy, M. A., Baxter, P. W. J., Panetta, F. D., Possingham, H. P., (2006). Ecology Letters 9(7), 759-766. Blackwell Publishing, Oxford, UK. English language
Tomley, A. J., Panetta, F. D., (2002). 13th Australian Weeds Conference: weeds "threats now and forever?", Sheraton Perth Hotel, Perth, Western Australia, 8-13 September 2002: papers and proceedings, 293-296. Plant Protection Society of Western Australia Inc, Victoria Park, Australia. English language
Bernard, C. B., Arnason, J. T., Philogène, B. J. R., Lam, J., Waddell, T., (1990). Entomologia Experimentalis et Applicata 57(1), 17-22. English language
Conklin, A. R., Biswas, P. K., (1978). Weed Science 26(2), 148-150. English language
Rush, M. C., Gooding, G. V., (1970). Phytopathology 60(12), 1756-1760. not specified language
USA, University of Illinois External factsheets, University of Illinois, 7 pp., English language