@misc{_2010,
 copyright={Copyright by Wydawnictwo Uniwersytetu Wrocławskiego Sp. z o.o.},
 address={Wrocław},
 howpublished={online},
 year={2010},
 publisher={Wydawnictwo Uniwersytetu Wrocławskiego},
 language={pol},
 language={ger},
 keywords={Duchy of Warsaw, Kingdom of Poland, legal regulations, special states},
}