Henao-Castaño, A.M. and Tobasura-Acuña, I. 2018. Rural extension approaches for the development of blackberry producers in the department of Caldas. Ciencia y Agricultura. 15, 2 (Jul. 2018), 25–38. DOI:https://doi.org/10.19053/01228420.v15.n2.2018.8393.