Fonte:
http://dre.pt/pdf1sdip/2011/02/04100/0119701197.pdf
http://dre.pt/pdf1sdip/2011/02/04100/0119701204.pdf
http://dre.pt/pdf1sdip/2011/02/04100/0120801209.pdf
http://dre.pt/pdf1sdip/2011/02/04100/0121701221.pdf
