Astronaut in Cathedral Sculptures (sources)
- "3 mysterious hidden carvings in Salanmanca," by Carolina Ayerbe, page in the Cultural Travel Guide website, posted 10-18-2011, viewed 10-25-2015 . Online at: http://www.culturaltravelguide.com/salamanca-mysterious-hidden-carvings
- "Cathedral of Salamanca's Astronaut," by Arztriper, page in the Atlas Obscura website, viewed 10-5-2015 . Online at: http://www.atlasobscura.com/places/catedral
- "Pop Culture Gargoyles Hidden in Gothic Architecture," by Latitia Barbier, page in the Atlas Obscura website, posted 6-10-2013, viewed 10-5-2015. Online at: http://www.atlasobscura.com/articles/pop-culture-gargoyles-in-gothic-architecture
- Postings in Pinterest, viewed 10-5-2015:
- Posted 2012: https://www.pinterest.com/pin/286541595011741346/
- Posted 2012: https://www.pinterest.com/pin/147704062748934978/
- Posted 2013: https://www.pinterest.com/pin/438889926156781508/
- Posted 2013: https://www.pinterest.com/pin/15340454953634832/
- Posted 2013: https://www.pinterest.com/pin/542191242609308906/
- Posted 2013: https://www.pinterest.com/pin/316870523752435391/
- Posted 2014: https://www.pinterest.com/pin/38843615512156210/
- Posted 2014: https://www.pinterest.com/pin/218846863117934726/
- Posted 2015: https://www.pinterest.com/pin/471189179739243515/
- Posted 2015: https://www.pinterest.com/pin/545217098617849399/