Question
The header Bibliography appears on both of the right and the left sides of the second page of my bibliography. How to make the header appear only on one side (left or right)?

Description
In my preamble, I have
\usepackage{fancyhdr}
\newcommand{\changefont}{\fontsize{10}{11}\selectfont}
\fancyhead[L]{\changefont \slshape \nouppercase \rightmark} %section
\fancyhead[R]{\changefont \slshape \nouppercase \leftmark} %chapter
\setlength{\headheight}{12.5pt}
\newcommand{\HRule}{\rule{\linewidth}{0.5mm}}
\pagestyle{fancy}
\documentclassto\end{document, including bibliography entries) that illustrates your problem. Without knowing the details of your setup it is not really possible to give advice. – gernot Jan 16 '21 at 20:37\fancyhead[L]{}before\bibliography{Bibliography}solved the problem. I can accept your answer. – Naghi Jan 16 '21 at 21:43