diff --git a/module3/exo3/exercice_co2_sujet1.ipynb b/module3/exo3/exercice_co2_sujet1.ipynb
index 0861a925137ed2572d55abdb860ce6ce3a594c9b..a9a1eac7094d5f2e11f6bb2480576c0ba8de5d0e 100644
--- a/module3/exo3/exercice_co2_sujet1.ipynb
+++ b/module3/exo3/exercice_co2_sujet1.ipynb
@@ -327,7 +327,7 @@
     "A = \\sqrt{\\alpha^2 + \\beta^2} \\qquad \\qquad \\varphi = \\arctan\\left(\\frac{\\beta}{\\alpha}\\right)\n",
     "$$\n",
     "\n",
-    "#### Mise en oeuvre :"
+    "#### Mise en oeuvre avec la librairie [statsmodels.api](https://www.statsmodels.org/devel/index.html) :"
    ]
   },
   {