diff --git a/ai/nlp-notes/models/transformer-notes.md b/ai/nlp-notes/models/transformer-notes.md
index 5dc8b26..714b2ce 100644
--- a/ai/nlp-notes/models/transformer-notes.md
+++ b/ai/nlp-notes/models/transformer-notes.md
@@ -98,6 +98,8 @@ Output:
 
 ## References
 
+[The Transformer model family - HF](https://huggingface.co/docs/transformers/model_summary)
+
 Documentation: 
 - [HuggingFace Transformers Framework](https://huggingface.co/docs/transformers/index)