diff --git a/src/intensivstationen/Intensivstationen.ipynb b/src/intensivstationen/Intensivstationen.ipynb
index 0087d164560..609186af4e0 100644
--- a/src/intensivstationen/Intensivstationen.ipynb
+++ b/src/intensivstationen/Intensivstationen.ipynb
@@ -819,9 +819,20 @@
    "source": [
     "publishGitHubPages()"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "cf0257ef",
+   "metadata": {},
+   "source": [
+    "### see https://knollfrank.github.io/HowBadIsMyBatch/intensivstationen.html"
+   ]
   }
  ],
  "metadata": {
+  "interpreter": {
+   "hash": "916dbcbb3f70747c44a77c7bcd40155683ae19c65e1c03b4aa3499c5328201f1"
+  },
   "kernelspec": {
    "display_name": "Python 3.10.4 64-bit",
    "language": "python",