Update README.md

README.md

@@ -11,4 +11,6 @@ pinned: false
 
 Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
 
-This project refers to tutorial: https://github.com/alejandro-ao/langchain-ask-pdf/tree/main
+This project refers to tutorial: 
+1. https://github.com/alejandro-ao/langchain-ask-pdf/tree/main
+2. https://github.com/sudan94/chat-pdf-hugginface/tree/main