How can I manually add bib entries? [duplicate]

Question

I have a .bib file so that every work cited with a \cite* command appears in the bibliography. But how do I add an extra item which I don't \cite anywhere in the document?

I am looking for a command like \addbibentry{author1999}, but have not found anything.

Answer 1

Use \nocite.

\documentclass{article}
\begin{document}
abc \nocite{Andrews99}
\bibliographystyle{unsrt}
\bibliography{test}
\end{document}

test.bib:

@book{Andrews99,
author   = {Andrews, G. E. and Askey, R. and Roy, R.},
title    = {Special Functions},
publisher= {Cambridge University Press},
year     = {1999}
}