* {{en}} [http://www.sciencedirect.com/science?_ob=GatewayURL&_origin=AUGATEWAY&_method=citationSearch&_piikey=S0003552103000840&_version=1&md5=f6dd58d559c19d58799b93a66225b038 Comparative study about Ötzi's therapeutic tattoos (L. Renaut, 2004, French and English abstract)]
* {{en}} [http://www.ephe.sorbonne.fr/ED2/renaut.htm PhD Thesis on body-marking in Antiquity (L. Renaut, 2004, French and English abstract)]
* {{en}} [http://www.momentmag.com/features/jun06/2006-06_Tattoo.html Marked for Life: Jews and Tattoos]
* {{en}} [http://www.harrisinteractive.com/news/allnewsbydate.asp?NewsID=691 Harris Interactive: A Third of Americans With Tattoos Say They Make Them Feel More Sexy]
* {{en}} [http://www.cdc.gov/ncidod/diseases/hepatitis/c/tattoo.htm CDC's Position on Tattooing and HCV Infection]
* {{en}} [http://www.cfsan.fda.gov/~dms/cos-204.html United States Food and Drug Administration - Tattoos and Permanent Makeup]
* {{en}} [http://acswebapplications.acs.org/applications/ccs/application/index.cfm?pressreleaseid=2459&categoryid=30 In the flesh: Chemical characterization of tattoo inks]
* {{en}} [http://www.mayoclinic.com/health/tattoos-and-piercings/MC00020 Mayo Clinic - Tattoos and piercings: What to know beforehand]
