Henao-Castaño, Angélica María, and Isaías Tobasura-Acuña. “Rural Extension Approaches for the Development of Blackberry Producers in the Department of Caldas”. Ciencia Y Agricultura, vol. 15, no. 2, July 2018, pp. 25-38, doi:10.19053/01228420.v15.n2.2018.8393.