Favoritos (CDU) – 9 Geografia. Biografia. História.
http://web.educom.pt/pr1305/histmain.htm
http://web.educom.pt/pr1305/histmain.htm
http://www.arqnet.pt/dicionario/afonso1.html
http://www1.ci.uc.pt/cd25a/wikka.php?wakka=homePage
http://www.instituto-camoes.pt/cvc/aprender-portugues/a-ler-era-uma-vez-rei.html