Fix references

book/_toc.yml

@@ -465,6 +465,4 @@ parts:
         - file: old/coding/2-2/1_2.ipynb
       - file: old/coding/2-2/1-part-2.md
       - file: old/coding/2-2/1-part-3.md
-# END REMOVE-FROM-PUBLISH
-
-- file: references.md
+# END REMOVE-FROM-PUBLISH
\ No newline at end of file

book/intro.md

@@ -13,3 +13,7 @@ Sometimes the interactivity will involve completing an exercise, wheras on other
 
 This is a new feature that we are actively working to incorporate in the MUDE textbook, so please provide us feedback via the [Answers platform](https://answers.citg.tudelft.nl/) if things go well or you have suggestions for improvement.
 ````
+
+**References**
+```{bibliography}
+```
\ No newline at end of file

requirements.txt

@@ -3,3 +3,4 @@ jupyter-book
 sphinx-inline-tabs
 git+https://github.com/dbalague/sphinx-grasple
 jupyterquiz
+docutils == 0.17.1
\ No newline at end of file