1. Agar, H. D. and Douglas, H. C.J. Bacteriol., 1957,73, 365–75.
2. Brachet, J...Biochemical Cytology (Academic Press, New York), 1957.
3. Callan, H. G...Symp. Soc. Exptl. Biol., 1952,6, 243–55.
4. Caspersson, T... Ibid., 1947,1, 127–51.
5. Chayen, J... Ibid., 1952,6, 290–305.