1. Gatenby, J. B., and Mathur, R. S., Nature, 185, 861 (1960).
2. Bowen, R. H., J. Morph., 39, 351 (1924).
3. Nath, V., and Bhatia, C. L., Res. Bull. Panjab Univ. (Old Series), 27, 33 (1953).
4. Gatenby, J. B., and Mukerji, R. N., Quart. J. Micr. Sci., 73, 1 (1929).
5. Mukerji, R. N., J. Roy. Micr. Soc., 49, 1 (1929).