bibliographiescitingnatbib
I am using the natbib with mnras bibstyle to control the citations.
I frequently use \cite{name}, \citep{name} to add a citation. Most of the papers I cite have several authors, so mostly "Doe et al. (2022)" is printed. However, in a particular paper, I want to emphasize the second author as well, namely I would like to cite a paper and print something like "Doe, Smith et al. (2022)", but only for a particular citation.
Is it possible?
Here is a proof of concept (no support for the optional argument, and something similar is needed for \citep and other cite commands), and also it assumes that the .bst style use "et al" for references for more that a single author.
The idea is to create something similar to \ifciteseen in biblatex. Thus we can create a list of references already cited in the document (and we exploit the list facilities of etoolbox). Then, if the reference has not been used before we use \citet*, and we add the key to the list of seen references. Otherwise, we use \citet.
\documentclass{article}
\usepackage{etoolbox}
\usepackage{natbib}
\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}
@article{test1,
author = {Author, A. and Buthor, B and Cuthor, C and Duthor, D},
title = {Title},
journal = {Journal},
year = 2013
}
@article{test2,
author = {Author, A. and Buthor, B and Cuthor, C and Duthor, D},
title = {Title},
journal = {Journal},
year = 2012
}
\end{filecontents}
\newcommand{\citelist}{}
\newcounter{currentcite}
\newcounter{currentcitetotal}
\newcommand{\mycite}[1]{
\setcounter{currentcitetotal}{0}
\renewcommand{\do}[1]{\addtocounter{currentcitetotal}{1}}
\docsvlist{#1}
\renewcommand{\do}[1]{%
\addtocounter{currentcite}{1}%
\ifinlist{##1}{\citelist}
{\citet{##1}}
{\citet*{##1}\listadd{\citelist}{##1}}%
\ifnumcomp{\value{currentcitetotal}}{>}{\value{currentcite}}
{, }
{}%
}
\docsvlist{#1}
}
\begin{document}
\mycite{test1,test2}
\mycite{test1}
\mycite{test2}
\bibliographystyle{plainnat}
\bibliography{\jobname}
\end{document}
A well-known bibliography style that generates authoryear-style citation call-outs and uses & as the conjunction if the bib entry has exactly two authors (or editors) is agsm. This bibliography style is part of the harvard citation management package, but it's compatible with the natbib package as well.
Best Answer
Since your use case is limited to a small number of cited pieces, you could make use of
natbib's citation aliasing mechanism to generate variant forms of citation call-outs.