1. Miljöhälsorapport
http://www.folkhalsomyndigheten.se/pagefiles/12933/miljohalsorapport-2009.pdf
2. The Swedish Horse Council Foundation
http://www.nshorse.se
3. Swedish Board of Agriculture
http://www.jordbruksverket.se/formedier/%20nyheter/nyheter2011/antalethastarisverigeuppskattastill362700.5.510b667f12d3729f91d80007251.html
4. Allergy,2011