Fonte:
http://dre.pt/pdf1sdip/2010/12/25300/0608706087.pdf
http://dre.pt/pdf1sdip/2010/12/25300/0608706088.pdf
http://dre.pt/pdf1sdip/2010/12/25300/0612106121.pdf
http://dre.pt/pdf1sdip/2010/12/25301/0000200322.pdf
