Australian Plant Census (2011) available at http://www.anbg.gov.au/cgi-bin/apclist .
Australia's Virtual Herbarium (AVH) (2007). Council of Heads of Australian Herbaria (CHAH). Available at http://www.chah.gov.au/avh/index.jsp .
Dellow, J.J. (1996) Herbicide techniques for thistle management. In Woodburn, T.L., Briese, D.T. and Corey, S. (eds) Thistle Management, Proceedings of a workshop held at CSIRO Division of Entomology, Canberra on 12-13 June 1996. Plant Protection Quarterly Vol.11 Supplement 2. Available at http://weeds.crc.org.au/documents/thistle_management.pdf .
Department of Primary Industries and Water, Tasmania (DPIW) (2002) Slender Thistles (Carduus tenuiflorus and Carduus pycnocephalus) - Control Guide. Available at http://www.dpiw.tas.gov.au/inter.nsf/WebPages/RPIO-4ZW8DH?open#EconomicSignificance .
Faithfull, I. (1998) Slender thistles. Keith Turnbull Research Institute, Frankston. Department of Primary Industries, Victoria. Available at http://www.dpi.vic.gov.au/dpi/nreninf.nsf/LinkView/503000849E8E15B5CA256BCF000AD567ECC844336D72F0634A256DEA00293F8A .
Groves, R.H. & Kaye, P.E. (1989) Germination and phenology of seven introduced thistle species in southern Australia. Australian Journal of Botany: 37: 351-9.
Hussey, B.M.J., Keighery, G.J., Cousens, R.D., Dodd, J., Lloyd, S.G. (1997). Western Weeds. A guide to the weeds of Western Australia. The Plant Protection Society of W.A, South Perth, W.A.
Navie S. (2004). Declared Plants of Australia. An identification and information system. Centre for Biological Information Technology: Brisbane. [CD-ROM]
Parsons, W.T. & Cuthbertson, E.C., (1992) Noxious weeds of Australia. Inkata Press, Melbourne.
Slee, A.V. (2007) Australian National Herbarium, Canberra. Personal communication.
Woodburn, T.L., Briese, D.T. and Corey, S. (eds) (1996) Thistle Management, Proceedings of a workshop held at CSIRO Division of Entomology, Canberra on 12-13 June 1996. Plant Protection Quarterly Vol.11 Supplement 2. Available at http://weeds.crc.org.au/documents/thistle_management.pdf .