1. T. S. Ma, J. Logun, andP. P. Mazzella, Microchem. J.1, 67 (1957).
2. T. S. Ma, ?Quantitative Microchemical Analysis?, inF. J. Welcher (ed.), Standard Methods of Chemical Analysis, 6th edition. Princeton: Van Nostrand. 1963. p. 410.
3. N. D. Cheronis andT. S. Ma, Organic Functional Group Analysis. New York: J.Wiley. 1964. p. 501.
4. W. J. Youden, Statistical Methods for Chemists. New York: J.Wiley. 1951.
5. W. Sch�niger, H. Lieb, andK. Gassner, Mikrochim. Acta [Wien]1953, 434.