Update README.md

README.md

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 PolitiBETO is a [BERT model](https://github.com/google-research/bert) tailored for political tasks in social media corpora. It is a Domain Adaptation on top of [BETO](https://huggingface.co/dccuchile/bert-base-spanish-wwm-uncased), a pretrained BERT in Spanish.
 This model is meant to be fine-tuned for downstream tasks.
+
+
+## Citation
+
+[NLP-CIMAT at PoliticEs 2022: PolitiBETO, a Domain-Adapted Transformer for Multi-class Political Author Profiling](https://ceur-ws.org/Vol-3202/politices-paper2.pdf)
+
+To cite this in a publication please use the following:
+
+```
+@inproceedings{PolitiBeto2022,
+  title={{NLP-CIMAT} at {P}olitic{E}s 2022: {P}oliti{BETO}, a {D}omain-{A}dapted {T}ransformer for {M}ulti-class {P}olitical {A}uthor {P}rofiling},
+  author={Emilio Villa-Cueva and Ivan Gonz{\'a}lez-Franco and Fernando Sanchez-Vega and Adri{\'a}n Pastor L{\'o}pez-Monroy},
+  booktitle={Proceedings of the Iberian Languages Evaluation Forum (IberLEF 2022)},
+  series    = {{CEUR} Workshop Proceedings},
+  publisher = {CEUR-WS},
+  year={2022}
+}
+```