fix bibtex in README

README.md

@@ -21,14 +21,16 @@ TODS is featured for:
 ## Cite this Work:
 If you find this  work useful, you may cite this work:
 ```
-@misc{lai2020tods,
-    title={TODS: An Automated Time Series Outlier Detection System},
-    author={Kwei-Harng Lai and Daochen Zha and Guanchu Wang and Junjie Xu and Yue Zhao and Devesh Kumar and Yile Chen and Purav Zumkhawaka and Minyang Wan and Diego Martinez and Xia Hu},
-    year={2020},
-    eprint={2009.09822},
-    archivePrefix={arXiv},
-    primaryClass={cs.DB}
+@article{Lai_Zha_Wang_Xu_Zhao_Kumar_Chen_Zumkhawaka_Wan_Martinez_Hu_2021, 
+	title={TODS: An Automated Time Series Outlier Detection System}, 
+	volume={35}, 
+	number={18}, 
+	journal={Proceedings of the AAAI Conference on Artificial Intelligence}, 
+	author={Lai, Kwei-Herng and Zha, Daochen and Wang, Guanchu and Xu, Junjie and Zhao, Yue and Kumar, Devesh and Chen, Yile and Zumkhawaka, Purav and Wan, Minyang and Martinez, Diego and Hu, Xia}, 
+	year={2021}, month={May}, 
+	pages={16060-16062} 
 }
+
 ```
 
 ## Installation