1. Cryptorchidism, management and implications,1983
2. Congenital deformities of the testis and epididymis;Scorer,1971
3. Normal and abnormal testicular descent in some mammals;Wensing,1980
4. The process of normal and abnormal testicular descent;Wensing,1997
5. Hormonal regulation of testicular descent: experimental and clinical observations;Rajfer;J. Urol.,1977