Pérez-Dacal, Diana, Yolanda Pena-Boquete, and Melchor Fernández. 2014. “A Measuring Tourism Specialization: A Composite Indicator for the Spanish Regions”. Almatourism - Journal of Tourism, Culture and Territorial Development 5 (9):35-73. https://doi.org/10.6092/issn.2036-5195/4403.