1. Etiology of vesical diverticula;Hinman;Jour. Urologie.,1919
2. Congenital diverticula of the bladder;Fischer;Surg. Gyn. and Obst.,1910
3. Englisch, J.: E ingesackte Steine der Harnblase. Wiener Med. Woch., Nr.25, 1903.
4. Wallfield, J. M.: Congenital diverticulum of the urinary bladder in infants and childiren. N. Y. Med. Jour., May 22, 1915.
5. McNeil, W. H.: Internat. Jour. of Surg., 1918, 368.