Update README.md

README.md

@@ -18,3 +18,13 @@
     - epoch2
     - ...
     - epoch5
+
+**Citation**
+```
+@article{yang2023using,
+  title={Using Human Feedback to Fine-tune Diffusion Models without Any Reward Model},
+  author={Yang, Kai and Tao, Jian and Lyu, Jiafei and Ge, Chunjiang and Chen, Jiaxin and Li, Qimai and Shen, Weihan and Zhu, Xiaolong and Li, Xiu},
+  journal={arXiv preprint arXiv:2311.13231},
+  year={2023}
+}
+```