Update model card

README.md

@@ -6,7 +6,15 @@ datasets:
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 ## ProcBERT
+ProcBERT is a pre-trained language model specifically for procedural text. It was pre-trained on a large-scale procedural corpus (PubMed articles/chemical patents/recipes) containing over 12B tokens and shows great performance on downstream tasks. More details can be found in the following paper:
 
+@article{Bai2021PretrainOA,
+  title={Pre-train or Annotate? Domain Adaptation with a Constrained Budget},
+  author={Fan Bai and Alan Ritter and Wei Xu},
+  journal={ArXiv},
+  year={2021},
+  volume={abs/2109.04711}
+}
 
 ## Usage
 ```