The word "References" does not appear before the references which I entered in my paper. The packages I am using are:

\documentclass[final,times,1p,leqno,11pt]{elsarticle}
\usepackage[latin1]{inputenc}
\usepackage{enumerate}
\usepackage{amsfonts}
\usepackage{amsmath}
\usepackage{amsthm}
\usepackage{amssymb}
\usepackage{latexsym}
\usepackage{multicol}
\usepackage{verbatim}
\usepackage{amscd}
\usepackage{mathrsfs}
\usepackage[usenames]{color}
\usepackage[all]{xy}


What is the reason of this issue?

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Has been asked (and answered) on comp.text.tex on november 2009, the title of the question is "Problem with references - elsarticle" –  robert.marik.cz May 16 '12 at 16:49
Thanks for accepting my answer, please also upvote it (this has to be done separately from accepting). –  lockstep May 16 '12 at 16:59

The elsarticle class will remove the bibliography heading by declaring

\let\bibsection\relax


if the amsrefs package is not loaded. You can override the class behaviour by adding, e,g.,

\def\bibsection{\section*{References}}


\documentclass{elsarticle}

\def\bibsection{\section*{References}}

\begin{document}

\begin{thebibliography}{9}
\bibitem{A01} A bibitem.
\end{thebibliography}

\end{document}


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While the version on CTAN has this issue, the current version downloaded from the Elsevier website does not (the \let\bibsection\relax line is commented out). –  cyberSingularity Oct 5 '12 at 12:21