Fonte:
http://dre.pt/pdf1sdip/2011/04/06601/0000200003.pdf
http://dre.pt/pdf1sdip/2011/04/06700/0199701997.pdf
http://dre.pt/pdf1sdip/2011/04/06700/0199702024.pdf
http://dre.pt/pdf1sdip/2011/04/06700/0202702028.pdf
http://dre.pt/pdf2sdip/2011/04/067000000/1566915669.pdf
