Fonte:
http://dre.pt/pdf1sdip/2008/12/25101/0000200023.pdf
http://dre.pt/pdf1sdip/2008/12/24901/0001000011.pdf
http://dre.pt/pdf1sdip/2008/12/24700/0901809019.pdf
http://dre.pt/pdf2sdip/2009/01/008000000/0118901190.pdf
