Libreplanet2023: Add references linking politics of the commons with freedom

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>

Libreplanet2023/Free_software_boot.tex

@@ -96,6 +96,9 @@
     \item The peasent movements / Via campesina
     \item Anarchist revolution in 1936 in Spain
     \item Zapatistas, Temporary autonomous zone, etc
+    \item Theorized through work on the commons by Elinor Ostrom,
+      Sivia Federici (Feminism and the politics of the commons), and
+      probably many others people as well.
     \end{itemize}
   }
 \end{frame}