Biggs, R. and Macfarlane, R.G. : Human Blood Coagulation and Its Disorders. 2nd Ed. Blackwell Scientific Publications, 1957.
2.
Pool, J.G. and Shannon, A.E.: Production of high-potency concentrates of antihemophilic globulin in a closed-bag system. Assay in vitro and in vivo. New Eng. J. Med.273: 1443, 1965.
3.
Colman, R.W. : Prothrombin times will no longer be reported in percentages. The MGH LaboratoryNewsletter, Vol. 1, No. 3, September 1967.
