Pina H. “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 ”. Journal for Geography, Vol. 5, no. 2, Dec. 2010, pp. 27-42, doi:10.18690/rg.5.2.4026.