1. 3. W. Bulloch, and P. Fildes , -Haemophilia, in Treasury of Human Inheritance, London, 1911 , pt. 5-6, sect. 140.
2. 4. Alsahavari , (Abulkasim EL Zahbevi). - Liber theoretioum necnon practicum; (Latin Translation of the Arab Original)Augsburg, Germany, 1519 .