1. Warburg, O., The metabolism of tumours, translated by Dickens, P., London (1930).
2. THE RÔLE OF THE ENZYME IN THE SUCCINATE-ENZYME-FUMARATE EQUILIBRIUM
3. THE FREE ENERGIES OF FORMATION OF AQUEOUS d-ALANINE, l-ASPARTIC ACID, AND d-GLUTAMIC ACID
4. Borsook, H., in Nord, F. F., and Weidenhagen, R., Ergebnisse der Enzymforschung, Leipzig, 4, 1 (1935).
5. Borsook, H., and Huffman, H. M., in Schmidt, C. L. A., The chemistry of the amino acids and proteins, Springfield and Baltimore, 822 (1938).