1. Gilchrist, R. K., Medal, R., Shorey, W. D., Hanselman, R. C., Parrot, J. C., and Taylor, C. B. (1957).Ann. Surg. 146, 596.
2. Gilchrist, R. K., (1960).Surg. Gynecol. & Obstet. 110, 499.
3. Mosso, J. A., and Rand, R. W., (1973).Ann. Surg. 178, 663.
4. Rand, R. W., and Mosso, J. A. (1972).Bull. LA Neurol. Soc. 37, 67.
5. Rand, R. W., Snyder, M., Elliott, D., and Snow, H. (1976).Bull. Los Angeles Neurol. Soc. 41 (4), 154.