Showing a references section header using BibTeX and revtex4-1

Question

I am using the revtex-4 document class. The bibliography command forms a references section, but there is no section title. Here is what it looks like:

How can I add a "References" header underneath the horizontal bar and above the references?

Answer 1

Not a 100% answer to your question, but according to LaTeX Ugly Line Above References you can use

\def\bibsection{\section*{\refname}} 

in your preamble to remove the separator and replace it with REFERENCES.