Update README.md

README.md

@@ -46,7 +46,7 @@ Just like its predecessor, Big Bird 2 captures emotional gradients in text, offe
 
 # 📚 Citation
 If you're using this model in your research or applications, appreciate if you could buy me a coffe through this citation.
-Mat Roni, S. (2025). Big Bird Flight 2 for ordinal sentiment analysis [software]. Hugging Face. https://huggingface.co/pvaluedotone/bigbird-flight-2
+Mat Roni, S. (2025). Big Bird Flight 2 for ordinal sentiment analysis [software]. Hugging Face. https://huggingface.co/pvaluedotone/bigbird-flight-2 DOI: https://doi.org/10.57967/hf/5780
 
 ## Validation metrics
 - loss: 1.6761