1. Janicek, G., J. Pokorny, and V. Pliska, Nahrung 5:399 (1961).
2. Sellés, E., and C. Brunner-Montes, Pharm. Acta Helv. 38:746 (1963).
3. “Official and Tentative Methods of the American Oil Chemists’ Society,” Vol. 1, Third Edition, AOCS, Champaign, Ill. 1964 (revised to 1972), Method Cd 8–53.
4. Fiedler, U., Talanta 20:1097 (1973).
5. Fiedler, U., Ibid. 20:1309 (1973).