https://portugal-em-pedra.blogspot.com/2019/08/fosseis-urbanos.html

https://sites.google.com/site/franciscolopes1979/rochas-e-fosseis/es-silves

https://snirh.apambiente.pt/index.php?idMain=4&idItem=3&idISubtem=link4

https://rce.casadasciencias.org/rceapp/pdf/2021/051/

https://portugal-em-pedra.blogspot.com/2019/08/fosseis-urbanos.html

https://www.beachcombingmagazine.com/blogs/news/colorful-chiton-shells

http://www.solancis.com/pt/pedreiras/extracao

https://tepbac.com/species/full/57/ngheu.htm

https://www.cienciaviva.pt/peixes/home/index.asp?accao=showpeixe&id_especie=29&idioma=pt

https://themarinedetective.com/category/marine-invertebrates/chitons/