Convention between the United Kingdom of Great Britain and Northern Ireland and Portugal for the avoidance of double taxation and the prevention of fiscal evasion with respect to taxes on income, Lisbon, 27 March.1968 : pres. to Parl. by the Secretary of State for Foreign Affairs

Taxing corporate profits in the EU : a comparison of the Portuguese, British, and Dutch systems

Teixeira, Gloria, (1997)

The Brazilian tax system and the economic relationship between Brazil and Portugal : the double taxation convention of 1971

Dornelles, Francisco, (1972)

Portugal

Pardal, Francisco Rodrigues, (1981)