%%
%% *****************************************
%% This file is defunct: for R Journal files please visit:
%% https://journal.r-project.org/
%% *****************************************
%%
\documentclass[a4paper]{report}
\usepackage{RJournal}
\usepackage[round]{natbib}
\bibliographystyle{abbrvnat}

\begin{document}

\begin{article}
  \input{RJtempl}
\end{article}

\end{document}