Llopis Agelán, E. “The Livestock Ovine of the Monastery of Guadalupe, 1598-1698: Lower Land and Labour Costs, and Improved Profit Margin”. Revista De Historia Industrial — Industrial History Review, vol. 15, no. 30, July 2017, pp. 11-51, https://revistes.ub.edu/index.php/HistoriaIndustrial/article/view/19619.