Fonte:
http://dre.pt/pdf1sdip/2011/03/05501/0000200002.pdf
http://dre.pt/pdf1sdip/2011/03/05600/0155201552.pdf
http://dre.pt/pdf1sdip/2011/03/05600/0155201559.pdf
http://dre.pt/pdf1sdip/2011/03/05600/0158501586.pdf
http://dre.pt/pdf2sdip/2011/03/056000000/1325913261.pdf
