archive.org/web/20161028054635/http://www.panoramio.com/user/6684186?with_photo_id=105393876 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161030034754/http://www.panoramio.com/user/6684186?with_photo_id=105393880 operator: Panoramio described at URL: https://web.archive...
31 May 2012 Source http://digithum.uoc.edu/ojs/index.php/digithum/article/view/n14-rodriguez-gonzalez-sierra-navarro-saorin Author Emilio José Rodríguez...
