1. Adriani, W., Z. Untersuch. Lebensm.,56, 187–194 (1928).
2. Bertram, S. H., van der Steur, J. P. K., and Waterman, H. I., Biochem. Z.,197, 1–7 (1928).
3. Boeseken, J., and Cohen, W. D., Biochem. Z.,201, 454–463 (1928).
4. von Bruchhausen, F., and Gerhard, H., Ber.,72B, 830–838 (1939).
5. Budowski, P., J. Am. Oil Chem. Soc.,27, 264–267 (1950).