RangelJ., EspinosaJ. A., de Pablos-HerederoC., RivasJ., PereaJ., AngónE. and García-MartínezA. (2017) “Is the increase of scale in the tropics a pathway to smallholders? Dimension and ecological zone effect on the mixed crop-livestock farms”, Spanish Journal of Agricultural Research, 15(2), p. e0109. doi: 10.5424/sjar/2017152-9561.