@Article{499773,
     author = "Michał Ptak",
     title = "Reduction of excise taxes on biofuels and the climate change policy ",
     year =  2012,
     volume =  29,
     number =  ,
     journal =  Studia i Prace Wydziału Nauk Ekonomicznych i Zarządzania,
     pages =  s. 135-149,
    }