@Article{39619,
     author = "Piotr Tosiek",
     title = "The formation of political groups in the European Parliament ",
     year =  2001,
     volume =  8,
     number =  ,
     journal =  Annales Universitatis Mariae Curie-Skłodowska. Sectio K, Politologia,
     pages =  s. 41-53,
    }