some folders modification

main.bib

+@article{bidon,
+title={citation bidon}
+}
\ No newline at end of file

main.tex → tex/main.tex

@@ -9,4 +9,7 @@
 \maketitle
 
 \include{omegacat}
+\cite{bidon}
+\bibliographystyle{alpha}
+\bibliography{main}
 \end{document}