Donovan J,Blare T 2018 Evaluation of UTZ certification coffee businesses in Guatemala, Honduras and Nicaragua http://www.worldagroforestry.org/downloads/Publications/PDFS/WP18028.pdf, http://dx.doi.org/10.5716/WP18028.PDF
Poole N,Donovan J A 2014 Building cooperative capacity: the specialty coffee sector in Nicaragua http://www.emeraldinsight.com/doi/pdfplus/10.1108/JADEE-01-2013-0002
Ugarte-Guerra L J,Alemán F, Galvan O, Ismael S, Nieto V, Prado L, Selma O, Wilnalia G 2010 Estudios de las cadenas de abastecimiento de germoplasma en cinco paises amazonicos http://www.worldagroforestry.org/downloads/Publications/pdfs/BC12072.PDF
Ugarte-Guerra L J,Alemán F 2010 Estudio de las cadenas de abastecimiento de germoplasma forestal en la Amazonía Boliviana http://www.worldagroforestry.org/downloads/publications/PDFs/WP16702.PDF