"Invasive Species". National Invasive Species Information Center, United States Department of Agriculture, USA. s. Common Teasel (Dipsacus fullonum). Arkiveret fra originalen 21. juli 2011. Hentet 2014-07-21. (engelsk)
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"Weeds of Australia". Department of Employment, Economic Development and Innovation. Queensland Government. s. Wild teasel Dipsacus fullonum subsp. fullonum. Arkiveret fra originalen 6. marts 2016. Hentet 2014-07-21. (engelsk)
"Invasive Species". National Invasive Species Information Center, United States Department of Agriculture, USA. s. Common Teasel (Dipsacus fullonum). Arkiveret fra originalen 21. juli 2011. Hentet 2014-07-21. (engelsk)
"Weeds of Australia". Department of Employment, Economic Development and Innovation. Queensland Government. s. Wild teasel Dipsacus fullonum subsp. fullonum. Arkiveret fra originalen 6. marts 2016. Hentet 2014-07-21. (engelsk)