1. Kropp KA. Male urethral strictures. In: Gillenwater JY, Grayhack JT, Howards SS, Duckett JW, editors. Adult and pediatric urology. Chicago: Year Book Medical; 1978. p. 1297–314.
2. McAnnich JW. Disorders of penis and urethra. In: Tanagho AE, McAnnich JW, editors. Smith’s general urology. 13th ed. London: Prentice-Hall International (Lange Medical Books); 1992. p. 602–5.
3. Martin P. Wound healing—aiming for perfect skin regeneration. Science. 1997;276:75–81.
4. Desmouliere A, Redard M, Darby I, Gabbiani G. Apoptosis mediates the decrease in cellularity during the transition between granulation tissue and scar. Am J Pathol. 1995;146:56–66.
5. Stocum DL, Zupanc GK. Stretching the limits: Stem cells in regeneration science. Dev Dyn. 2008;237(12):3648–71.