@misc{Brückner_Aleksander_(1856–1939)_Piast_1907, author={Brückner, Aleksander (1856–1939)}, copyright={Public Domain}, howpublished={online}, year={1907}, language={pol}, title={Piast}, type={Text}, URL={http://rcin.org.pl/iae/Content/4802/PDF/WA308_14572_B5536_PIAST_I.pdf}, keywords={Polish anthroponymy, etymology of the name "Piast"}, }