1. Cholelithiasis in persons under 25 years old;Goodman;JAMA,1976
2. Gallbladder disease in patients 20 years of age and under;Odom;South Med J,1976
3. Churchman: quoted according to 4.
4. Pathogenesis of the lime bile in the gall bladder;Leszczynski;Pol Przegl Radiol,1960
5. A case of milk of calcium within the gall bladder;Marciniak;Pol Rev Radiol,1966