@misc{Keutgen_Friedrich_(1861–1936)_Der_1918,
 author={Keutgen, Friedrich (1861–1936)},
 copyright={Public Domain},
 address={Jena},
 howpublished={online},
 year={1918},
 publisher={G. Fischer},
 language={ger},
 title={Der deutsche Staat des Mittelalters},
 URL={http://rcin.org.pl./Content/17362/PDF/WA308_12118_II15617_DEUTSCHE-STAAT_I.pdf},
 keywords={Middle Ages -- Germany, history of Germany, history of medieval law, medieval state law, statehood -- concept, state -- organization, state -- political system, power and authority in the Middle Ages, power and authority structures in the Middle Ages, medieval territorial power and authority, socio-political history of Germany},
}