1. Bizzozero, G., 1882. Virchow Arch. Path. Anat. Physiol. 90, 261.
2. Hayem, G., 1882. CR Acad. Sci. Paris 95, 18.
3. Eberth, J. C. and Schimmelbush, C., 1886. Virchow's Arch. Path. Anat. Physiol. 3, 39.
4. von Willebrand, E. A., 1926. Finsk. Lakaresallsk. Handl. 68, 87?112.
5. Maupin, B., 1969. Blood Platelets in Man and Animals, Oxford: Pergamon. Vol. 1, pp. 541, Vol. 2, pp. 487.