Belgrade - More than 70,000 people have signed a petition demanding the resignation of President Slobodan Milosevic of Yugoslavia, an official of the opposition leader, Mr Zoran Djindjic's Democratic Party (DS) said at a press conference. The signing of the petition, organised by the Alliance for Change (SZP), a coalition dominated by the DS, will continue until early August when the signatures will be compiled and presented to the federal authorities.