1. An International Multicentre Trial (1975) Prevention of fatal post-operative pulmonary embolism by low doses of heparin. Lancet 11: 45–51
2. Austen DEG, Rhymes IL(1975) A laboratory manual of blood coagulation, 1st edn. Blackwell, Oxford
3. Bell WR, Meek AG (1979) Guidelines for the use of thrombolytic agents. N Engl J Med 301: 1266–1270
4. Bennett B (1977) Coagulation pathways: Interrelationship and control mechanisms. Semin Haematol 14: 301–318
5. Biggs R (1978) The treatment of haemophilia A and B and von Willebrand’s disease, 1st edn. Blackwell, Oxford