Espejo-Serna, A., A. R. López-Ferrari, R. Jiménez- Machorro, and L. Sánchez -Saldaña. “Orchids from Coffee-Plantations in Mexico: An Alternative for the Sustainable Use of Tropical Ecosystems”. Revista De Biología Tropical, vol. 53, no. 1-2, June 2005, pp. 73–84, doi:10.15517/rbt.v53i1-2.14367.