1. Guidelines on oral anticoagulation. In: Haemostasis and thrombosis task force report;Shinton, N.K.
2. Laboratory diagnosis of blood coagulation disorders;Austen, D.E.G.; Rhymes, L.,1984
3. Standardisation of coagulation tests and assays in quality control;Barrowcliffe, T.W.,1982
4. General considerations on a coumarin induced hypercoagulability and its control;Loeliger, E.A.,1969
5. IX and X during longterm treatment with coumarin;Thrombosis Diathesis Haemorrhagica,1963