Fonte:
http://www.dgci.min-financas.pt/NR/rdonlyres/C7BCB71E-0D6E-42AE-B43C-A253EB83BBAC/0/A509_2006387-Aquisicoes_intracom_isentas.pdf
http://www.dgci.min-financas.pt/NR/rdonlyres/F2D6C601-A80E-4AB7-B837-2A8987A49C4B/0/T9092007007-8_Directiva_Espanha.pdf
http://www.dgci.min-financas.pt/NR/rdonlyres/0F77D5AB-F3D7-4D7F-939C-18D95DAD524E/0/F254_2006064-Transf_bens.pdf
http://www.dgci.min-financas.pt/NR/rdonlyres/B875CABD-A344-4A0E-B5AF-829F2409A16E/0/R119_2006509-IPSSl.pdf
http://www.dgci.min-financas.pt/NR/rdonlyres/B1D6C0F5-64C6-4CA0-8FB2-ED9B605C54B8/0/A100_2007012-Gas.pdf
