My bibliography of my tex document doesn't work and I can't find out why. I created 2 books in bibTex, but if I refer to them via
%%% Main Document
\bibliography{Seminar}
\begin{thebibliography}
\bibitem[Knuth98]{ComProgram} \emph{The Art of Computer Programming}
\end{thebibliography}
The compiler says missing item on these lines. I did it just as in the tutorial in which I found these lines. The bib file is also in the same folder as the document. I found many tutorials on google but I just don't seem to get it.