1. Cooney, Patricia M., Evans, C. D., Schwab, A. W., and Cowan, J. C., J. Am. Oil Chemists' Soc.,35, 152–156 (1958).
2. Dutton, H. J., Schwab, A. W., Moser, Helen A., and Cowan, J. C., J. Am. Oil Chemists' Soc.,25, 385–388 (1948).
3. Dutton, H. J., Schwab, A. W., Moser, Helen A., and Cowan, J. C., J. Am. Oil Chemists' Soc.,26, 441–444 (1949).
4. Epstein, A. K., Reynold, H. L., and Hartley, M. L., U. S. Patent 2,140,793 (1938).
5. Evans, C. D., Schwab, A. W., Moser, Helen A., Hawley, J. E., and Melvin, E. H., J. Am. Oil Chemists' Soc.,28, 67–73 (1951).