%! TEX root = ../../facharbeit.tex
% LTeX: language=de-DE

% \nocite{*} % cite everything. Regardless if it was used or not
\printbibheading[heading=bibintoc, title={Literatur}]
\printbibliography[nottype=article,nottype=online,heading=subbibliography,title={Bücher}]
\printbibliography[type=article,heading=subbibliography,title={Artikel}]
\printbibliography[type=online,heading=subbibliography,title={Internet}]