Update README.md

README.md

@@ -17,7 +17,7 @@ HelioBERT-XL is a BERT-based language model specialized for heliophysics domain
 
 The suffix XL refers to the scale and scope of the pretraining corpus, not to the model architecture.
 
-An independently developed model named HelioBERT has been described in prior work using a much smaller corpus of curated definitions. Although the names partially overlap, the two models were developed independently and differ substantially in training data, objectives, and coverage.
+An independently developed model named HelioBERT has been described in prior work by Khoo, F.S. et al. (2023) using curated definitions and abstracts. Although the names partially overlap, the two models were developed independently and differ substantially in training data.
 
 ## Model Details