1. Lingappa, B. T., and Lingappa, Y., J. Gen. Microbiol., 41, 67 (1965).
2. Lingappa, B. T., and Lingappa, Y., J. Gen. Microbiol., 43, 91 (1966).
3. Cromwell, B. T., in Modern Methods of Plant Analysis, IV (edit. by Paech, K., and Tracey, M. V.), 367 (Springer-Verlag, Berlin, 1955).
4. Shriner, R. L., Fuson, R. C., and Curtin, D. Y., The Systematic Identification of Organic Compounds, fourth ed., 63 (John Wiley, New York, 1956).
5. Randerath, K., Thin-Layer Chromatography, 74 (Academic Press, 1964).