Update README.md

README.md

@@ -32,4 +32,15 @@ If you need the full dataset, you can send an email to obtain the Baidu Cloud li
 
 PPM is a binary image format. If you need PNG format, we provide conversion code, which you can download and convert by yourself.
 
-I have full parameter information for each trajectory. If you need other parameter information, such as IMU, detailed drone parameters, etc., you can contact me by email at any time.
+I have full parameter information for each trajectory. If you need other parameter information, such as IMU, detailed drone parameters, etc., you can contact me by email at any time.
+
+## Citation
+
+```bibtex
+@inproceedings{feng2025u2udata2scalableswarmuavs,
+title={U2UData-2: A Scalable Swarm UAVs Autonomous Flight Dataset for Long-horizon Tasks},
+author={Tongtong Feng and Xin Wang and Feilin Han and Leping Zhang and Wenwu Zhu},
+year={2025},
+url={https://arxiv.org/abs/2509.00055}
+}
+```