README: add alternative git repositories

README.md

@@ -181,10 +181,14 @@ Currently the latex default font is the one used for the content.
 
 # ![(git logo)](https://www.inf.usi.ch/postdoc/roman/img/logo_git_50x50.png) Contribute
 
-Git repository: https://gitlab.inria.fr/proman/mathstic-thesis-template
+To propose changes, (1) you first have to request access to this repository (top page link, [HOWTO](https://docs.gitlab.com/ee/user/project/members/#project-membership-and-requesting-access)), (2) push your branch to this repository once access is granted, and finally (3) create a pull request with your proposed changes. Or just create an issue.
 
-To propose changes, (1) you first have to request access to this repository (top page link, [howto](https://docs.gitlab.com/ee/user/project/members/#project-membership-and-requesting-access)), (2) push your branch to this repository once access is granted, and finally (3) create a pull request with your proposed changes. Or just create an issue.
-
-Maintainers: Louiza Yala (2018-), Pierre-Louis Roman (2019-)
+Maintainers: Louiza Yala (2018-), Pierre-Louis Roman (2019-).
 
 Contributors: Louiza Yala, Pierre-Louis Roman, Lucas Bourneuf, Corentin Guezenoc, Clément Elbaz, Florian Arrestier.
+
+Upstream git repository: https://gitlab.inria.fr/proman/mathstic-thesis-template
+
+Alternative repositories with a squashed history:
+- https://github.com/remolaz/PhD_Thesis_Template_MathSTIC
+- https://github.com/ahonorat/mathSTICtemplatePhD