English operator: Panoramio described at URL: https://web.archive.org/web/20161024105643/http://www.panoramio.com/photo/81008357...
archive.org/web/20161024184710/http://www.panoramio.com/user/3794713?with_photo_id=80422042 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161026211347/http://www.panoramio.com/user/3794713?with_photo_id=80842506 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161024111402/http://www.panoramio.com/user/3794713?with_photo_id=80749319 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161025225130/http://www.panoramio.com/user/3794713?with_photo_id=80216749 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161026082326/http://www.panoramio.com/user/3794713?with_photo_id=80226685 operator: Panoramio described at URL: https://web.archive...
Ángel; SIERRA CANDUELA, Jorge A.; NAVARRO SANZ, Santiago; SAORÍN, Tomás (2012). "Wiki Loves Monuments 2011: the experience in Spain and reflections regarding...
English operator: Panoramio described at URL: https://web.archive.org/web/20161027042027/http://www.panoramio.com/photo/81538397...
archive.org/web/20161024190444/http://www.panoramio.com/user/7111109?with_photo_id=81164366 operator: Panoramio described at URL: https://web.archive...
English operator: Panoramio described at URL: https://web.archive.org/web/20161024143609/http://www.panoramio.com/photo/81080419 determination method...
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