1. Astrup, T., and Darling, S. (1942). Acta physiol. scand., 4, 293.
2. Biggs, R., and Douglas, A. S. (1953). Journal of Clinical Pathology, 6, 23.
3. Human Blood Coagulation and Its Disorders;Biggs, R.; Douglas, A.S.; Macfarlane, R.G.,1953
4. Boshamer, K. (1927). Klin. Wschr., 6, 740.
5. Holden, W. D., Cole, J. W., and Davis, J. H. (1949). Surg. Gynec. Obstet., 89, 20.