Serbian Deputy Prime Minister Miroljub Labus, Croatian Minister of EU Integration Kolinda Grabar-Kitarovic and Dutch Minister for Development Cooperation Agnes van Ardenne-van der Hoeven signed today in Vukovar a declaration on re-establishing the ferryboat line across the Danube River on the border between the Bac-Vukovar municipalities, in a project worth more than one million euros and which was supported by a donation from the Netherlands.