update citation

README.md

@@ -216,6 +216,20 @@ Paper following soon.
 
 ## 🎓 Citation
 
+If you find our models useful, please consider giving a star and citation
+
+arXiv:
+
+```bibtex
+@article{li2025prorank,
+  title={ProRank: Prompt Warmup via Reinforcement Learning for Small Language Models Reranking},
+  author={Li, Xianming and Shakir, Aamir and Huang, Rui and Lipp, Julius and Li, Jing},
+  journal={arXiv preprint arXiv:2506.03487},
+  year={2025}
+}
+```
+
+blog post:
 ```bibtex
 @online{v2rerank2025mxbai,
   title={Baked-in Brilliance: Reranking Meets RL with mxbai-rerank-v2},