H. . Pina, “The Importance of Complementarity in the Territorial Cohesion and Sustainability of Rural Areas: The Case of Cambres, a Douro Winegrowing Area, and Magueija, a Mountainous Area ”, RG, vol. 5, no. 2, pp. 27–42, Dec. 2010, doi: 10.18690/rg.5.2.4026.