Pardo Abad, Carlos J. 2014. «Indicators of Touristic Sustainability Applied to the Industrial and Mining Heritage: Evaluation of Results in Some Case Studies». Boletín De La Asociación De Geógrafos Españoles, n.º 65 (agosto). Madrid, Spain. https://bage.age-geografia.es/ojs/index.php/bage/article/view/1759.