Goulda, Kevin, Andrew F. Howard and Gustavo Rodriguéz. "Sustainable production of non-timber forest products: Natural dye extraction from El Cruce Dos Aguadas, Petén, Guatemala." Forest Ecology and Management 111/1 (November 1998): 69-82.

Goulda, Kevin, Andrew F. Howard and Gustavo Rodriguéz. "Sustainable production of non-timber forest products: Natural dye extraction from El Cruce Dos Aguadas, Petén, Guatemala." Forest Ecology and Management 111/1 (November 1998): 69-82.