1. Recurrent condyloma acuminatum due to piercing of the penis;Altman;Cutis,1997
2. The urologist's guide to genital piercing;Anderson;BJU Int.,2003
3. The hole picture: risks, decision making, purpose, regulations, and the future of body piercing;Armstrong;Clin. Dermatol.,2007
4. Official Website;Association of Professional Piercers,2014
5. Official Website;Body Modification Ezine,2014