Fonte:
http://info.portaldasfinancas.gov.pt/NR/rdonlyres/FD7B4EA6-2DD7-43A7-B484-EC4C903D11CC/0/IGF%20AUDITORIA%20ano%20da%20utilizacao%20do%20credito%20de%20imposto%20por%20DTI.pdf
http://info.portaldasfinancas.gov.pt/NR/rdonlyres/321FFE4A-CB3A-414C-BAA2-14D9B4DC601E/0/IGF%20AUDITORIA%20.pdf
http://info.portaldasfinancas.gov.pt/NR/rdonlyres/EDAC661A-A3CF-47AB-B913-9FD40CD3432C/0/IRS_8160%2010%20-%20permuta%20por%20bens%20futuros.pdf
