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2. Clark RH, Schmidt FE, Hendren T: Retroperitoneal extravasation of barium enema. J Louisiana Med Soc 113: 90, 1961
3. Cove JK, Snyder RN: Fatal barium intravasation during barium enema. Radiology 112: 9, 1974
4. Kay S: Tissue reaction to barium sulfate contrast medium: Histopathologic study. Arch Pathol 57: 279, 1954
5. Kay S, Choy SH: Results of intraperitoneal injection of barium sulfate contrast medium: An experimental study. Arch Pathol 59: 388, 1955