1. Chapman, A.M. 1958. An historical analysis of the tropical forest tribes on the southern border of Mesoamerica. Unpublished Ph.D. dissertation, Columbia University, New York.
2. Antimicrobial activity of phenolic constituents of Magnolia grandiflora L;Clark;Journal of Pharmaceutical Science,1981
3. Antimicrobial properties of heartwood, bark/sapwood and leaves of Juniperus species;Clark;Phythotherapy Research,1990
4. Clark, A.M., Hufford, C.D., Pererson, J.R., Zjawiony, J.K., Lui, S., Walker, L.A. 1991. Antifungal copyrine alkaloids: in vitro and in vivo antifungal activities of sampangines. 31st Interscience Conference on Antimicorbial Agents and Chemotherapy, American Society for Microbiology, Sept. 29–Oct. 2, Washington DC.
5. Antifungal alkaloids;Clark,1992