Resources.
https://www.healthline.com/symptomsearch? addterm = Hårfarge Endre
Healthline.com for informasjon om hår fargeendringer.
https://www.mothernature.com/Library/Bookshelf/Books/16/98.cfm
Mothernature.com på håret Endringer
https://www.keratin.com/as/as006.shtml
Chemical Induced Hårfarge Endringer
https://www.fbi.gov/hq/lab/fsc/backissu/july2000/ubelaker.htm
FBI.
gov: Studier av endringer i håret pigmentering hos barn