@misc{Knackfuss_Hermann_(1848-1915)_Tizian, author={Knackfuss, Hermann (1848-1915)}, address={Bielefeld}, address={Leipzig}, howpublished={online}, publisher={Verlag von Velhagen und Klasing}, language={ger}, type={książka}, title={Tizian}, keywords={Tiziano Vecellio (około 1488-1576)}, }