\documentclass{beamer}
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% importations
\usepackage[french]{babel} % pour dire que le texte est en francais
\usepackage{nth}
\usepackage{csquotes}
\usepackage[T1]{fontenc} % pour les font postscript
\usepackage[cyr]{aeguill} % Police vectorielle TrueType, guillemets francais
\usepackage{epsfig} % pour gérer les images
\usepackage{amsmath,amsthm, stmaryrd} % très bon mode mathématique
\usepackage{amsfonts,amssymb,bm, bbold}% permet la definition des ensembles
\usepackage{algorithm2e} % pour les algorithmes
\usepackage{algpseudocode} % pour les algorithmes
\usepackage{graphicx}
\usepackage{subcaption}
\usepackage{booktabs}
\usepackage{tabularx}
\usepackage{xcolor} % Couleurs
\usepackage{xstring}
\usepackage{float} % pour le placement des figure
\usepackage{url} % pour une gestion efficace des url
\usepackage{hyperref}  % pour les hyperliens dans le document
\usepackage{tikz} % For graph plots
\usepackage{adjustbox} % To resize tikzpictures
\usepackage{fontawesome5}
\usepackage{makecell}
\usepackage{appendixnumberbeamer} % Pour cacher la numérotation des backups slides
\usepackage{chronology} % Frise chronologique

% Tables
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% Color
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% Beamer
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% \setbeamertemplate{footline}{%
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% bibliographie
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\addbibresource{references.bib}
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% Tikz
%% Tikz Related
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% Couleurs
% pour tickz multilevel
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% Footnote
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\makeatother

\subtitle{Audition de candidature de thèse à l'EDMH}
\title[Comparaison de structures de réseaux]{Comparaison de structures de
    réseaux.
    Applications à des réseaux écologiques}
\author[L. Lacoste]{Louis \textsc{Lacoste}\newline{\small Supervisé par Sophie Donnet et Pierre Barbillon, co-encadré par Julie Aubert}\newline\newline UMR MIA Paris-Saclay} % Sous la supervision de Pierre
\date{23 mai 2024}

\begin{document}

% titre
\begin{frame}[noframenumbering,plain]
    \maketitle
\end{frame}

\begin{frame}
    \tableofcontents[hideallsubsections]
\end{frame}

\begin{refsection}
\include{principal}
\renewcommand{\pgfuseimage}[1]{\scalebox{.75}{\includegraphics{#1}}}
\begin{frame}[noframenumbering,plain,allowframebreaks]
    \frametitle{Bibliographie}
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\end{frame}
\end{refsection}

\appendix

\begin{refsection}
\include{backup-slides}
\renewcommand{\pgfuseimage}[1]{\scalebox{.75}{\includegraphics{#1}}}
\begin{frame}[noframenumbering,plain,allowframebreaks]
    \frametitle{Bibliographie des annexes}
    \printbibliography
\end{frame}
\end{refsection}

\end{document}