Coley, Phyllis D., Heller, Maria V., Aizprua, Rafael, Arauz, Blanca, Flores, Nayda, Correa A., Mireya D., Gupta, Mahabir P., Solis, Pablo N., Ortega-Barría, Eduardo, Romero, Luz I., Gomez, Basilio, Ramos, Marla, Cubilla-Rios, Luis, Capson, Todd L., and Kursar, Thomas A. 2003. "Use of Ecological Criteria in Designing Plant Collection Strategies for Drug Discovery." Frontiers in Ecology and the Environment. 421–428.