Update README.md

README.md

@@ -91,4 +91,16 @@ def countCompleteDayPairs(hours: List[int]) -> int:
 - test
 ```python
 assert countCompleteDayPairs([12, 12, 30, 24, 24]) == 2
-```
+```
+
+
+### Citation
+
+```
+@article{li2025cocoevo,
+  title={CoCoEvo: Co-Evolution of Programs and Test Cases to Enhance Code Generation},
+  author={Li, Kefan and Yu, Hongyue and Guo, Tingyu and Cao, Shijie and Yuan, Yuan},
+  journal={arXiv preprint arXiv:2502.10802},
+  year={2025}
+}
+```