Alemán, F., y L. Anderssson. «EFFECTS OF PRECEDING CROP AND WEED CONTROL METHOD ON WEEDS AND COMMON BEAN (Phaseoulus Vulgaris L.) YIELD IN A NO-TILLAGE CROPPING SYSTEM». La Calera, vol. 4, n.º 4, octubre de 2011, pp. 10-17, https://revistasnicaragua.cnu.edu.ni/index.php/CALERA/article/view/79.