# How to use \citet when using \bibliographystyle{spphys}?

I downloaded this template from Springer; when I use \citet with \bibliographystyle{spphys}, it returns something like (author?)[12]. I want the number between the bracket, but I don't know why it doesn't show the name of the author? I'd really appreciate your help.

% proceed on the \documentclass line
% your LaTeX will extract the file if required
\begin{filecontents*}{example.eps}
%%BoundingBox: 19 19 221 221
%%CreationDate: Mon Sep 29 1997
%%Creator: programmed by hand (JK)
gsave
newpath
20 20 moveto
20 220 lineto
220 220 lineto
220 20 lineto
closepath
2 setlinewidth
gsave
.4 setgray fill
grestore
stroke
grestore
\end{filecontents*}
%
% \RequirePackage{fix-cm}
%
%\documentclass{svjour3}                     % onecolumn (standard format)
%\documentclass[smallcondensed]{svjour3}     % onecolumn (ditto)
\documentclass[smallextended]{svjour3}       % onecolumn (second format)
%\documentclass[twocolumn]{svjour3}          % twocolumn
%
\smartqed  % flush right qed marks, e.g. at end of proof
%
% \usepackage{graphicx}
%
% \usepackage{mathptmx}      % use Times fonts if available on your TeX system
%
% insert here the call for the packages your document requires
%\usepackage{latexsym}
% etc.
%
% please place your own definitions here and don't use \def but
% \newcommand{}{}
%
% Insert the name of "your journal" with
% \journalname{myjournal}
%

\usepackage{natbib}
\usepackage{graphicx}% Include figure files
\usepackage{dcolumn}% Align table columns on decimal point
\usepackage{bm}% bold math

\begin{document}

\citet{Bell}

\bibliographystyle{spphys}       % APS-like style for physics
\bibliography{library}

\end{document}

• spphys doesn't appear to be on CTAN. The versions I found floating around on the web all do not appear to support natbib (specifically natbib's author-year citation handling), so \citet and the option authoryear will not work as expected. There is little you can do here if you are forced to use spphys. Either choose a style that supports natbib (not sure if that is possible if you are going to submit to Springer, you probably ought to use their template) or don't use natbib's \citet or authoryear features. – moewe Jan 9 at 16:38
• Thanks for your response. I have to use spphys. Is there any way to use \citet without natbib? – moj Jan 10 at 14:07
• Not really, no. spphys simply does not expose the author to LaTeX in a manner that is usable for citation commands. – moewe Jan 10 at 15:14