Fonte:
http://www.dre.pt/pdf1sdip/2007/05/10500/36183629.PDF
http://www.dre.pt/pdf2sdip/2007/05/101000000/1413714137.pdf
http://www.dre.pt/pdf1sdip/2007/05/10100/34273427.PDF
http://www.dre.pt/pdf1sdip/2007/06/12000/40124013.PDF
