Tunalı, Tuğba, Ayşen Yarat, and Nesrin Emekli. 2004. “Standardization of Bovine Lung Thromboplastin According to the WHO Report: Calculation of the ISI Value and the Prothrombin Time As INR”. ITU ARI Bulletin of Istanbul Technical University 54 (01):22-25. https://ari.itu.edu.tr/index.php/ituari/article/view/5.