1. Ammon, R.: Pflügers Arch. 233, 486 (1933).
2. Ammon, R.: Erg. Enzymforschg. 4, 102 (1935).
3. Augustinsson, K.-B.: In Sumner-Myrbäck, The Enzymes, Vol. I, Part 1, p. 433. New York 1950.
4. Augustinsson, K.-B.: Acta physiol. scand. (Stockh.) 15, Suppl. 52 (1948).
5. Augustinsson, K.-B.: Acta chem. scand. (Stockh.) 5, 699 (1951).