1. Case of horn on the glans penis;Jewett;New York M. Times,1854
2. On horny growth of the penis;Brinton;J. Cutan. & G.U. Dis.,1887
3. Young's Practice of Urology;Young,1926
4. Cutaneous horn of the penis;Goldstein;J. Urol.,1933
5. Cornification of the glans penis;Van der Velde;J. Michigan M. Soc.,1936