diff --git a/notebooks/substack_extraction.ipynb b/notebooks/substack_extraction.ipynb
index 70c739f0354260dc6361322e7914f28fcce2cbf8..2e02d967384bc4137c916b995311ecc724429784 100644
--- a/notebooks/substack_extraction.ipynb
+++ b/notebooks/substack_extraction.ipynb
@@ -6,7 +6,7 @@
    "source": [
     "# Substack extraction\n",
     "\n",
-    "This notebook is used to extract substacks from tomogram at the positions of the T3SS. Manually determined T3SS landmark coordinates (see the definition of 0, 1, 2 in the T3SS geometry notebook) are used to\n",
+    "This notebook is used to extract substacks from tomogram at the positions of the T3SS. Manually determined T3SS landmark coordinates (see the definition of 0, 1, 2 in the T3SS measurments notebook) are used to\n",
     "- determine the centers of the substacks and\n",
     "- and their orientations in 3D.\n",
     "\n",