1. Phimosis in antiquity;Hodges;World J Urol,1999
2. The penis in history;Raveenthiran,2017
3. A mind of its own: a cultural history of the penis;Friedman,2001
4. A social history of male circumcision;Aggleton;Reprod Health Matters,2007
5. Foreskin — a closer look;Berkeley,1993