Add DESY Cheetah citation

README.md

@@ -11,3 +11,19 @@ short_description: Cheetah is a particle tracking tool for fast RL training
 ---
 
 Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
+
+### 📚 Citation
+
+If you use **Cheetah**, please cite the following works:
+
+- **Jan Kaiser, Chenran Xu, Annika Eichler, Andrea Santamaria Garcia**  
+  *Bridging the gap between machine learning and particle accelerator physics with high-speed, differentiable simulations*  
+  *Physical Review Accelerators and Beams*, **27**, 054601 (May 2024)  
+  [https://doi.org/10.1103/PhysRevAccelBeams.27.054601](https://doi.org/10.1103/PhysRevAccelBeams.27.054601)
+
+- **Oliver Stein, Jan Kaiser, Annika Eichler**  
+  *Accelerating Linear Beam Dynamics Simulations for Machine Learning Applications*  
+  *Proceedings of the 13th International Particle Accelerator Conference (IPAC 2022)*
+
+If you use 3D meshes generated by Cheetah, please also adhere to the licensing terms of the  
+[_3D Assets for Particle Accelerators_ repository](https://github.com/desy-ml/3d-assets).