1. Barker, H. A.: Separation, identification, and estimation of lower fatty acids. In: Methods in Enzymology (Colowick, S. P., and N. O. Kaplan, eds.), vol. III, pp. 372?382. New York: Academic Press 1957.
2. ?: Fermentation of nitrogenous organic compounds. In: The Bacteria (Gunsalus, I. C., and R. Y. Stanier, eds.), vol. II, pp. 151?207. New York: Academic Press 1961.
3. ?: Chemical synthesis and resolution of (±)-citramalic acid. In: Biochemical Preparations (Coon, M. J., ed.), vol. 9, pp. 25?29. New York: J. Wiley 1962.
4. ?, and A. H. Blair: Enzymatic synthesis of (+)-citramalic acid. In: Biochemical Preparations (Coon, M. J., ed.), vol. 9, pp. 21?25. New York: J. Wiley 1962.
5. ?, V. Rooze, F. Suzuki, and A. A. Iodice: The glutamate mutase system. Assays and properties. J. biol. Chem. 239, 3260?3266 (1964).