1. Gulliver, G. C. (1846). The Works of William Hewson (Bartholomew Close, London: J. Adland)
2. Metchnikoff, E. (1905). Immunity in Infective Diseases, p. 70. (New York and London: Johnson Reprint Corp.)
3. Vincent, P. C. (1977). Granulocyte kinetics in health and disease. Clin. Haematol., 6, 695
4. Rickard, K. A., Shadduck, R. K., Morley, A. and Stohlman, F. (1970). Invitro and in vivo colony technic in the study of granulopoiesis. In Stohlman, F. Jr. (ed.) Hemopoietic Cellular Proliferation (New York: Grune and Stratton)
5. Rickard, K. A., Morley, A., Howard, D., Garrity, M. and Stohlman, F. Jr. (1971). Stem cell stimulatory properties in vitro of an agar colony-stimulating factor. Proc. Soc. Exp. Biol. Med., 136, 608