1. Roberts, E., and Frankel, S. 1949. Free amino acids in normal and neoplastic tissues of mice as studied by paper chromatography. Cancer Res. 9:654?658.
2. Roberts, E., and Frankel, S. 1950. ?-Aminobutyric acid in brain: Its formation from glutamic acid. J. Biol. Chem. 187:55?63.
3. Gerschenfeld, H. M. 1973. Chemical transmission in invertebrate central nervous systems and neuromuscular junctions. Physiol. Rev. 53:1?119.
4. Bazemore, A. K., Elliott, A. C., and Florey, E. 1957. Isolation of factor I. J. Neurochem. 1:334?339.
5. Takeuchi, A. 1976. Studies of the inhibitory effects of GABA in invertebrate nervous systems. Pages 255?267, in Roberts, E., Chase, T. N., and Tower, D. B. (eds.), GABA in Nervous System Function, Raven Press, New York.