http://www.foroxerbar.com/viewtopic.php?t=6360

http://www.tesourosdegalicia.com/antonio-palacios/

http://www.icog.es/TyT/index.php/2013/09/los-materiales-petreos-utilizados-en-la-obra-de-antonio-palacios/

http://www.foroxerbar.com/viewtopic.php?t=6360