Using \cite with biber inside tikzpictures

Question

I'm using biber and want to cite references inside a tikzpicture. I followed this answer that described how to do it with bibtex and it works nicely, but when switching to use biber, it doesn't work anymore:

\documentclass{article}
\usepackage{tikz}

\usepackage[backend=biber]{biblatex}

\begin{document}

\begin{tikzpicture}[show/.style={circle,draw}]
\node[show]    (newpaper)    at    (0,2)    
    [label=right:{This 2011 paper ...}]    
    {\cite{newpaper}};
\node[show]    (oldpaper)   at     (0,0)    
     [label=right:{This paper came out in 1900 ...}]    
    {\cite{oldpaper}};
\draw[->]    (oldpaper) -- (newpaper);
\end{tikzpicture}


%\bibliographystyle{amsplain}
\begin{thebibliography}{10}
\bibitem{newerpaper}B. Becker, \emph{Even Newer Stuff}, 2012.
\bibitem{newpaper}C. Charles, \emph{New Stuff}, 2011.
\bibitem{oldpaper}H. Huckley, \emph{Old Stuff}, 1900.
\end{thebibliography}
\end{document} 

Does anyone know of a solution without me having to switch to use bibtex?

UPDATE:

As noted by several below, my original code I posted was an easy fix. The actual bug I found was a result of my larger LaTeX code and I found the issue. Here's the updated code that has the issue:

\documentclass{article}
\usepackage{tikz}

\usetikzlibrary{external}
\tikzexternalize[prefix=fig/]

\usepackage[backend=biber]{biblatex}

\usepackage{filecontents}

\begin{filecontents}{\jobname.bib}
@book{newerpaper,
    author={B. Becker},
    title={Even Newer Stuff},
    date={2012}
}

@book{newpaper,
    author={C. Charles},
    title={New Stuff},
    date={2011}
}

@book{oldpaper,
    author={H. Huckley},
    title={Old Stuff},
    date={1900}
}

\end{filecontents}

\addbibresource{\jobname.bib}

\begin{document}

%\tikzexternaldisable
\begin{tikzpicture}[show/.style={circle,draw}]
\node[show]    (newpaper)    at    (0,2)    
[label=right:{This 2011 paper ...}]    
{\cite{newpaper}};
\node[show]    (oldpaper)   at     (0,0)    
[label=right:{This paper came out in 1900 ...}]    
{\cite{oldpaper}};
\draw[->]    (oldpaper) -- (newpaper);
\end{tikzpicture}
%\tikzexternalenable

\printbibliography

\end{document} 

The problem is with the \tikzexternalize[prefix=fig/] command. I got around this issue by adding \tikzexternaldisable before the tikzpicture and \tikzexternalenable after the tikzpicture.

Answer 1

As suggested in the comments, you should move to biblatex's way of dealing with the bibliography, rather than doing it by hand. E.g.:

\documentclass{article}
\usepackage{tikz}

\usepackage[backend=biber]{biblatex}

\usepackage{filecontents}

\begin{filecontents}{\jobname.bib}
@book{newerpaper,
    author={B. Becker},
    title={Even Newer Stuff},
    date={2012}
}

@book{newpaper,
    author={C. Charles},
    title={New Stuff},
    date={2011}
}

@book{oldpaper,
    author={H. Huckley},
    title={Old Stuff},
    date={1900}
}

\end{filecontents}

\addbibresource{\jobname.bib}

\begin{document}

\begin{tikzpicture}[show/.style={circle,draw}]
\node[show]    (newpaper)    at    (0,2)    
    [label=right:{This 2011 paper ...}]    
    {\cite{newpaper}};
\node[show]    (oldpaper)   at     (0,0)    
     [label=right:{This paper came out in 1900 ...}]    
    {\cite{oldpaper}};
\draw[->]    (oldpaper) -- (newpaper);
\end{tikzpicture}

\printbibliography

\end{document} 

Which produces:

Edit: As it turned out, the issue is essentially one of the correct use of biblatex/biber, and has little to do with TikZ, so a list of starters with biblatex could be handy:

• biblatex in a nutshell (for beginners) (the link suggested by Alan Munn)
• What to do to switch to biblatex
• What is the difference between bibtex and biblatex?
• biblatex's documentation