1. Accessory and ectopic scrota;Lamm;Urology,1977
2. Über Penisverdoppelung und ihre Komplikationen;Kimura;Jap. J. Urol.,1930
3. Accessory scrotum, posteriorly located: review of the literature and report of a case;Daut;J. Iowa Med. Soc.,1949
4. Accessory scrotum: report of a case;Nagano;Acta Urol. Jap.,1971
5. Accessory scrotum: a case report;Takayasu;J. Urol.,1974