If a letter of invitation is needed for the visa application, MCI can send this upon request after you have registered for the Astra Tech World Congress and the payment for the registration fee and hotel has been received see contact details of MCI. The letter of invitation does not represent a commitment on the part of the organisers to provide financial support. The deadline to request an invitation letter for use in seeking a visa is 7 March 2012.
To se the nationalities concerned please read the List of foreign citizens who require Visa for entry into Sweden. The Swedish Migration Board, for information and application forms in different languages
The Swedish Embassies, for detailed information on visas and application forms for each individual country
The Swedish Government Office, for general information on visas