Fonte:
http://dre.pt/pdf1sdip/2009/10/19900/0764907653.pdf
http://dre.pt/pdf1sdip/2009/10/19900/0765307655.pdf
http://dre.pt/pdf1sdip/2009/10/19900/0773107733.pdf
http://dre.pt/pdf2sdip/2009/10/199000000/4154241542.pdf
