diff --git a/README.md b/README.md
index 3686325..3434df4 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 
 ## Desription
 
-A REALM text embedding operator implemented with pretrained models from [Huggingface Transformers](https://huggingface.co/docs/transformers).
+A REALM[1] text embedding operator implemented with pretrained models from [Huggingface Transformers](https://huggingface.co/docs/transformers).
 
 
 
@@ -71,4 +71,4 @@ dc.glob['text']('Hello, world.')
   .show()
 ```
 
-
+[1] https://arxiv.org/abs/2002.08909