Copied from the document:  
 Reports and proceedings of the 8 April European public hearing on “Crimes committed by totalitarian regimes, organised by the Slovenian Presidency of the Council of the European Union (January–June 2008) and the European Commission. Notice the word Report, It is on the document itself. 
 You should say it was published by: Slovenian Presidency of the Council of the European Union & etc. Issue addressed. 
My citation on the article:  European Public Hearing on "Crimes Committed by Totalitarian Regimes” Slovenian Presidency of the Council of the European Union (January–June 2008) and the European Commission. (As per document). I'll check my other ones and if they are not per document, I'll change them.