diff --git a/Additional-Learning-Resources.md b/Additional-Learning-Resources.md
index d2c876f..7d0d187 100644
--- a/Additional-Learning-Resources.md
+++ b/Additional-Learning-Resources.md
@@ -1,3 +1,7 @@
+## Documentation
+
+You can find documentation about the core of PDF.js [here](https://github.com/MeiKatz/pdfjs-docs/blob/master/README.md) (contributed by user [MeiKatz](https://github.com/MeiKatz)).
+
 ## Publications
 
 You can read more about PDF.js here: