Update README.md (#126)

* Update README.md

* Update README.md

README.md

@@ -152,7 +152,8 @@ where `--train-maps` allows you to specify the training maps and `--eval-maps` t
 
 ## Papers written using Gym-μRTS
 
-* CoG 2021: [Gym-μRTS: Toward Affordable Deep Reinforcement Learning Research in Real-time Strategy Games](https://arxiv.org/abs/2105.13807)
+* AIIDE 2022 Strategy Games Workshop: [Transformers as Policies for Variable Action Environments](https://arxiv.org/abs/2301.03679)
+* CoG 2021: [Gym-μRTS: Toward Affordable Deep Reinforcement Learning Research in Real-time Strategy Games](https://arxiv.org/abs/2105.13807),
 * AAAI RLG 2021: [Generalization in Deep Reinforcement Learning with Real-time Strategy Games](http://aaai-rlg.mlanctot.info/papers/AAAI21-RLG_paper_33.pdf),
 * AIIDE 2020 Strategy Games Workshop: [Action Guidance: Getting the Best of Training Agents with Sparse Rewards and Shaped Rewards](https://arxiv.org/abs/2010.03956),
 * AIIDE 2019 Strategy Games Workshop: [Comparing Observation and Action Representations for Deep Reinforcement Learning in MicroRTS](https://arxiv.org/abs/1910.12134),