1. Morton, J.F., “Plants Poisonous to People in Florida and Other Warm Areas,’ Hurricane House, Miami, FL, 1971, pp. 56–57.
2. Kingsbury, John M., “Poisonous Plants of the United States and Canada,” Prentice Hall, Inc., Englewood Cliffs, NJ, 1964, p. 278.
3. Bailey, A.E., “Industrial Oil and Fat Products,” 3rd Edition, Interscience Publishers, New York, HY, 1964, p. 740.
4. Dal Nogare, S., and R.S. Juvet, Jr., “Gas-Liquid Chromatography,” Interscience Publishers, New York, NY, 1965, p. 256.
5. Polesuk, J., and T. Sima, Mikrochim. Acta [Wien] 1973:393.