# Increasing title spacing after bibliography heading - natbib package - memoir class

I am trying to add a 2 double space after the heading Bibliography for my thesis. I have tried several solutions and they all fail. the permeable is as follow and I am using natbib library. any help is appreciated.

\documentclass[]{memoir}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{graphicx}
\usepackage{wrapfig}
\usepackage{subcaption}
\usepackage{amsmath}
\usepackage{mathtools}
\usepackage[labelsep=space]{caption}
\usepackage{booktabs}
\usepackage{varwidth}
\usepackage{array}
\usepackage[table]{xcolor}% http://ctan.org/pkg/xcolor
\usepackage{enumitem}
\usepackage{xfrac}
\usepackage{float}
\usepackage{caption}
\usepackage{multirow}
\usepackage{titlesec}
\bibliographystyle{unsrtnat}
\usepackage[numbers,sort&compress]{natbib}
\usepackage{url}

\begin{document}
% thesis stuff

\bibliography{bibs}
\end{document}


the content of bibs.bib file is as follow:

@article{panayi_schock_chui_ejakov_2006, title={Parameterization and FEA  Approach for the Assessment of Piston Characteristics}, DOI={10.4271/2006-01-0429}, journal={SAE Technical Paper Series}, author={Panayi, Andreas and Schock, Harold and Chui, Boon-Keat and Ejakov, Mikhail}, year={2006}, month={3}}


I found the following but this changes the title text and format. I can not figure out where to modify to add additional space after the title (bibliography)

\makeatletter
\renewenvironment{thebibliography}[1]
{\refname%
\@mkboth{\MakeUppercase\refname}{\MakeUppercase\refname}%
\list{\@biblabel{\@arabic\c@enumiv}}%
{\settowidth\labelwidth{\@biblabel{#1}}%
\leftmargin\labelwidth
\@openbib@code
\usecounter{enumiv}%
\let\p@enumiv\@empty
\renewcommand\theenumiv{\@arabic\c@enumiv}}%
\sloppy
\clubpenalty4000
\@clubpenalty \clubpenalty
\widowpenalty4000%
\sfcode\.\@m}
{\def\@noitemerr
{\@latex@warning{Empty thebibliography' environment}}%
\endlist}
\makeatother


the marked space is currently one space and would lie to increase it to double space.

• Welcome to TeX.SX! Please make your example compilable (provide an example bib file) and minimal (remove all unnecessary packages). – TeXnician Sep 28 '17 at 15:40
• Thank you Texnician. I have included the unnecessary packages so that if a new package could be used to solve my issue; it is compatible with the ones that are currently in use. I have also edited the original post to include the bib file. – merinadica Sep 29 '17 at 13:24

You could (mis)use the \bibpreamble to add any space you want between the title and the content of the bibliography.

\documentclass{memoir}

\bibliographystyle{unsrtnat}
\usepackage[numbers,sort&compress]{natbib}

\usepackage{filecontents}
\begin{filecontents*}{\jobname.bib}
@article{panayi_schock_chui_ejakov_2006,
title={Parameterization and FEA  Approach for the Assessment of Piston Characteristics},
DOI={10.4271/2006-01-0429},
journal={SAE Technical Paper Series},
author={Panayi, Andreas and Schock, Harold and Chui, Boon-Keat and Ejakov, Mikhail},
year={2006},
month={3}
}
\end{filecontents*}

\renewcommand{\bibpreamble}{\vskip3cm}

\begin{document}
\nocite{*}
\bibliography{\jobname}
\end{document}

• Thank you so much for your help. That solved my problem. – merinadica Oct 2 '17 at 16:14
• @merinadica You're welcome! – user36296 Oct 2 '17 at 16:16