Yves DÉLOYE and Michael BRUTER (eds), Encyclopaedia of European Elections, London, Palgrave Macmillan, 2007, 43-51
BARTOLINI, Stefano, Cleavages, in Yves DÉLOYE and Michael BRUTER (eds), Encyclopaedia of European Elections, London, Palgrave Macmillan, 2007, 43-51
- https://hdl.handle.net/1814/27465