1. Corrigan JJ Jr. The vitamin K dependent proteins.Adv Pediatr 1981; 28: 57–74.
2. Dormentary K. London Coagulation Manual 1989, Haemophilia Centre, Royal Free Hospital, London.
3. Mancinie G, Garbonora AU, Heremans JF. Immuno-chemical quantitation of antigens by single radial im-munodiffusion.Immunochemistry 1965; 2: 235–241.
4. Rapaport S, Dodd K. Hypoprothrombinemia in infants with diarrhoea.Am J Dis Child 1946; 71: 611–618.
5. Matoth Y. Plasma prothrombin in infantile diarrhoea.Am J Dis Child 1950; 75: 944–954.