1. Neue sesquiterpenlactone aus Aster umbellatus
2. Studies in Neotropical Burseraceae. II. Generic Limits in New World Protieae and Canarieae
3. Grooming with Trattinnickia resin: possible pharmaceutical plant use by coatis in Panama
4. Hegnauer, R., 1977. The Chemistry of the Compositae. In: Heywood, V.H., Harborne, J.B., Turner, B.L. (Eds.). The Biology and Chemistry of the Compositae. Academic Press, London, p. 284.
5. Khalid, S.A., 1983. Chemistry of the Burseraceae. In: Waterman, P.G., Grundon, M.F. (Eds.). Chemistry and Chemical Taxonomy of the Rutales. Academic Press, London, p. 281.