1Duckctt JW. Hypospadiaw. In:Walsh PC, Retik AB, Stamey TA, et al. eds. Campbell' s Urology. Philadelphia: Saunders, 1992. 1893-1918.
2Charles B, Manley MD. Age cosideration in elective penile surgery.In:Edmond TG,David R. Common problems in pediatric urology. St Louis: Mosby-year Book, 1991. 367-372.