Links på dansk
https://www.wikiwand.com/da/Indikatorplante
https://www.wikiwand.com/da/Plantesociologi
Links på engelsk
https://eap.mcgill.ca/publications/EAP67.htm
http://byronshirechemicalfreelandcare.org/weed-values/weeds-as-environmental-indicators/
https://www.canr.msu.edu/ipm/agriculture/field_crops/identifying_weeds_in_field_crops
https://core.ac.uk/download/pdf/84057763.pdf
https://www.wikiwand.com/en/Soil_seed_bank
http://ensconet.maich.gr/People_Dormancy.htm
https://identify.plantnet.org/
Links på fransk
http://gabb32.org/wp-content/uploads/2017/01/Guide_bio_indication_vegetale_BDG_GABB32.pdf
https://slideplayer.fr/slide/11153546/
https://www.youtube.com/watch?v=PlGDnVqUtB8
https://www.youtube.com/watch?v=Ojd9bom1tmE
https://www.youtube.com/watch?v=chpg-koESEw