1. Wyatt, P. J., Nature, 221, 1257 (1969).
2. Wyatt, P. J., Appl. Optics, 7, 1879 (1968).
3. Wyatt, P. J., Proc. Third Internat. Biophysics Conf. (Cambridge, Massachusetts, 1969).
4. Salton, M. R. J., The Bacterial Cell Wall (Elsevier, Amsterdam, 1964).
5. Kratohvil, J. P., and Smart, C., J. Colloid Sci., 20, 875 (1965).