1. Jaeger, O.A., U.S. Patent 2,028,091 (1936).
2. Caryl, C.R., Ind. Eng. Chem. 33:731 (1941).
3. Freund, E.H., U.S. Patent 3,293,272 (1966).
4. Meismer, D., Baker’sDig. 45:381 (1969).
5. Food Chemicals Codex, Natl. Acad. of Sci., Washington, DC, 1972, pp. 907-910.