Delgado, G., A. Burbano, and A. Silva Parra. “Evaluation of the Macrofauna of the Soil Associated to Different Systems With Cofee Coffea arábiga L”. Revista De Ciencias Agrícolas, vol. 28, no. 1, Jan. 2011, pp. 91-106, https://revistas.udenar.edu.co/index.php/rfacia/article/view/34.