1) Hoff brand, A.V.: Practical Haematology (ed. by Dacie, J.V. and Smith, S.M.) , pp. 498, Churchill Livingstone, Edinburgh, London and New York (1975)
2) Da Costa, M., et al.: Gun. Res., 18, 453 (1970)
3) Kubasik, N.P., et al.: Gun. Chem., 21, 1922 (1975)
4) Mantzos, J.D., et al.: Acta Haematol., 51, 204 (1974)
5) Johnson, I., et al.: J. Gun. Path., 30, 645 (1977)