Jansen, Jan. “The Infield-Outfield Farming System As a Major Solution for Sustainable Management of the Semi-Natural and Cultural Heritage in Parque Natural Da Serra Da Estrela”. Lazaroa 29 (February 2, 2009): 19–26. Accessed November 27, 2024. https://revistas.ucm.es/index.php/LAZA/article/view/LAZA0808110019A.