Fonte:
http://info.portaldasfinancas.gov.pt/NR/rdonlyres/CD3BDF90-C594-44EA-BFF5-BBDDF42CEDA2/0/of_circulado_20145_derramas.pdf
http://info.portaldasfinancas.gov.pt/NR/rdonlyres/90FA06BA-C61B-4249-B280-C2F965B2688F/0/SELO_007_1_J_.pdf
http://info.portaldasfinancas.gov.pt/NR/rdonlyres/9EFFB9C1-A1FD-4F08-8C01-26BF5EB8E5C8/0/SELO_007_1_L_IVE_73.pdf
http://info.portaldasfinancas.gov.pt/NR/rdonlyres/F45747BE-D4D3-49A1-9518-C3970CFACDDD/0/I_Selo-V_19-2_TGIS-135.pdf
