Letters of invitation required to meet the administrative and legal regulations for visas of some countries are available to participants upon written requests.
Please contact the conference secretary.
VISA maybe required online or at the local/national Portuguese embassy or consulate. For a complete list of countries whose citizens are required to obtain a Schengen visa in order to enter please click on list of countries.
Additional information available at the website of Schengen VISA information www.schengenvisainfo.com