teelt
https://www.herbapolonica.pl/app/webroot/magazines-files/8345618-Sadowska%20&%20Andrzejewska.pdf
https://www.agriculture.gov.sk.ca/Default.aspx?DN=9f9ebf1f-6e30-451f-a1ea-d711a59f5d21
https://www.usask.ca/agriculture/plantsci/vegetable/med/mmt.htm
https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.122.9755&rep=rep1&type=pdf
https://www.gov.mb.ca/agriculture/crops/production/milk-thistle.html