Fonte:
http://www.dgci.min-financas.pt/NR/rdonlyres/6292BDC6-08AE-4421-BC27-E3C5E1FBBF15/0/T909_2005154-AIC.pdf
http://www.dgci.min-financas.pt/NR/rdonlyres/BB042ADD-4CC9-42A0-AF0A-B8D0F186D303/0/T909_2006203-Vendas_dist.pdf
http://www.dgci.min-financas.pt/NR/rdonlyres/28702DC8-A255-48A9-B218-4570F4D5D72F/0/T909_2005154-TIVB-Isen.pdf
