Fonte:
http://dre.pt/pdf1sdip/2009/05/09500/0309903107.pdf
http://dre.pt/pdf1sdip/2009/05/09500/0310703118.pdf
http://dre.pt/pdf1sdip/2009/05/09500/0311803126.pdf
http://dre.pt/pdf2sdip/2009/05/095000000/1934019340.pdf
