Update README.md

README.md

@@ -13,7 +13,7 @@ ESPnet is an end-to-end speech processing toolkit covering end-to-end speech rec
 ESPnet uses [pytorch](http://pytorch.org/) as a deep learning engine and also follows [Kaldi](http://kaldi-asr.org/) style data processing, feature extraction/format, and recipes to provide a complete setup for various speech processing experiments.
 
 
-## Citations
+<details><summary>Citing ESPnet</summary>
 
 ```BibTex
 @inproceedings{watanabe2018espnet,
@@ -68,4 +68,5 @@ ESPnet uses [pytorch](http://pytorch.org/) as a deep learning engine and also fo
   journal={arXiv preprint arXiv:2111.14706},
   year={2021}
 }
-```
+
+</details>