Prime Minister George Papandreou held separate meetings on Friday, on the sidelines of the sessions of the Party of European Socialists (PES) leaders taking place in Athens, with Zlatko Lagumdzija, President of SDP, Bosnia Herzegovina, Eamon Gilmore, President of the Labour Party, Ireland, Martine Aubry, First Secretary of the PS, France, Boris Tadic, President of the Republic of Serbia and leader of the Serb Democratic Party.