1. Unusual position of foreign bodies in the bladder;Krakowsyi;Polski Przeglad. Chir.,1972
2. Foreign bodies in the urinary tract;Taguchi;Iryc,1969
3. Urological Oddities;Dakin,1948
4. Foreign-body injuries of the urethra and bladder in the young and their pyschosexual background;Bilcher;Urol. Internat.,1971
5. Self-insertion of urethral foreign bodies;Mitchell;Psych. Quart.,1971