1. Abelson, P. H., and W. R. Duvy: Radioactive sodium permeability and exchange in frog eggs. Biol. Bull. 96, 205 (1949).
2. Aboim, A. X.: L’organe interrénal des sélaciens. Étude cytologique, histochimique et histophysiologique. Arch. Portugaises Sci. Biol. 7, 89 (1944).
3. Abood, L. G., R. W. Gerard and J. Banks: Substrate and enzyme distribution in cells of the nervous system. Amer. J. Physiol. 168, 728 (1952).
4. Abramson, H. A., L. S. Moyer and M. H. Gorin: Electrophoresis of proteins and the chemistry of cell surfaces. New York 1942.
5. Ada, G. L.: Phospholipin metabolism in rabbit-liver cytoplasm. Bio-chemic. J. 45, 422 (1949).