?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Gattei&rft.aufirst=Stefano&rft.au=Gattei%2C+Stefano&rft.btitle=Encyclopedia+of+Modern+Political+Thought&rft.title=Popper%2C+Karl&rft.date=2013&rft.genre=bookitem