SOFIA (Reuters) - Bulgarian right-wing activists backed by the opposition GERB party demanded on Monday a referendum to challenge the voting rules in the Balkan country in what has become an increasingly divisive issue in the run up to European vote this May.
About 150 people marched from Sofia University to the parliament building in downtown Sofia and submitted more than 560,000 signatures to parliament calling for the referendum - above the half million they need to force a plebiscite.
