1. Expert Committee on Biological Standardization;WHO,1983
2. International Committee for Standardization in Haematology and International Committee on Thrombosis and Haemostasis. Recommendations for reporting prothrombin time in oral anticoagulant control;Loeliger, E.A.;Thromiib Haenmost,1985
3. Thromboplastin related differences in the determination of international normalised ratio: a cause for concern?;Kitchen, S.; Walker, I.D.; Woods, T.A.L.; Preston, F.E.;Thromiib Haeniost,1994
4. Use of lyophilised calibration plasmas and control blood for international normalized ratio calculation in external quality assessment of the prothrombin time;den Besselaar AMHP, Van;An] Clin Pathol,1994
5. INR standardization bv the calibrated plasma procedure;Houbouyan, L.; Bonvarlet, M.N.; Comby, S.; Sanvert, M.; Rageade, C.; Dupuy, G.,1995