Munur á milli breytinga „Bjarnarkló“

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(Bjarga 3 heimildum og merki 0 sem dauðar.) #IABot (v2.0.7)
 
* [http://wayback.vefsafn.is/wayback/20050614165852/floraislands.is/heracman.htm Tröllahvönn] (Flóra Íslands)
* [http://www.ni.is/grodur/rannsoknir/agengartegundir/risahvannir Risahvannir í íslenskri náttúru (Náttúrufræðistofnun)]
* [http://www.netregs.gov.uk/netregs/63103.aspx Identifying and removing Giant hogweed] {{Webarchive|url=https://web.archive.org/web/20090903124029/http://www.netregs.gov.uk/netregs/63103.aspx |date=2009-09-03 }} on NetRegs.gov.uk
* [http://www.invadingspecies.com/Invaders.cfm?A=Page&PID=31 InvadingSpecies.com - advice from Ontario, Canada] {{Webarchive|url=https://web.archive.org/web/20090116184652/http://www.invadingspecies.com/Invaders.cfm?A=Page&PID=31 |date=2009-01-16 }}
* [http://mic-ro.com/plants/ Contact-Poisonous Plants of the World]
* [http://y2u.co.uk/&002_Images/Hogweed%2001.htm Photos of Giant Hogweed] {{Webarchive|url=https://web.archive.org/web/20171102234704/http://y2u.co.uk/%26002_Images/Hogweed%2001.htm |date=2017-11-02 }}
* [http://www.giant-alien.dk/ Manual for eradication of Giant Hogweed - available for download as pdf]
* [http://www.ymparisto.fi/default.asp?contentid=34356&lan=fi Environment Agency of Finland: Photo of the blisters caused by the plant (Graphic)]