1. Baker, S. J., and Jacob, E. (1960). J. clin. Path., 13, 214.
2. Bell, W. N. (1951). Blood, 6, 1199.
3. Human Blood Coagulation and its Disorders;Biggs, R.; Macfarlane, R.G.,1957
4. Castex, M. R., and Pavlovsky, A. (1947). Sang, 18, 1.
5. Eagle, H., Johnston, C. G., and Ravdin, 1. S. (1937). Bull. Johns Hopk. Hosp., 60, 428.