I'm using revtex4 as my document class and apsrev4 as my bib style. I would like to remove the horizontal black line above the references.
How can I do this? Here's what I have without the text:
\documentclass[aps,12pt,tightenlines]{revtex4-1}
\usepackage{graphicx,topcapt,booktabs,SIunits,units,mhchem}
\begin{document}
\bibstyle{apsrev4}
\bibliography{research}
\pagestyle{plain}
\end{document}

\documentclass{...}and ending with\end{document}. To what black line do you refer? Perhaps a screen shot would help – Jul 30 '14 at 23:39