Update README.md

README.md

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 license: cc-by-4.0
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-`cyT5-small` is a light-weight (alpha-version) Welsh T5 model extracted from the `google/mt5-small` model and fine-tuned only on the [Welsh summarization dataset](https://huggingface.co/datasets/ignatius/welsh_summarization) described in the [Introducing the Welsh Text Summarisation Dataset and Baseline Systems](https://arxiv.org/abs/2205.02545) paper.
+`cyT5-small` is a light-weight (alpha-version) Welsh T5 model extracted from the `google/mt5-small` model and fine-tuned only on the [Welsh summarization dataset](https://huggingface.co/datasets/ignatius/welsh_summarization).
+
+ 
+**Citation:**
+[Introducing the Welsh Text Summarisation Dataset and Baseline Systems](https://arxiv.org/abs/2205.02545).
+
+```
+@article{ezeani2022introducing,
+  title={Introducing the Welsh text summarisation dataset and baseline systems},
+  author={Ezeani, Ignatius and El-Haj, Mahmoud and Morris, Jonathan and Knight, Dawn},
+  journal={arXiv preprint arXiv:2205.02545},
+  year={2022}
+}
+```
 
 Further developments are ongoing and will update will be shared soon.