Used the "official" model card and added citation

README.md

@@ -1,8 +1,34 @@
 ---
 language: el
 ---
+
 # GreekSocialBERT
 
-A Greek language model based on [GreekBERT](https://huggingface.co/nlpaueb/bert-base-greek-uncased-v1), further trained on a corpus of 458,293 documents collected from Greek social media accounts. 
+## Model description
+
+A Greek language model based on [GreekBERT](https://huggingface.co/nlpaueb/bert-base-greek-uncased-v1)
+
+## Training data
+
+The training data is a corpus of 458,293 documents collected from Greek social media accounts. 
+
+The training corpus has been collected and provided by [Palo LTD](http://www.paloservices.com/)
+
+## Eval results
+
+### BibTeX entry and citation info
 
-The training corpus has been collected and provided by [Palo LTD](http://www.paloservices.com/)
+```bibtex
+@Article{info12080331,
+AUTHOR = {Alexandridis, Georgios and Varlamis, Iraklis and Korovesis, Konstantinos and Caridakis, George and Tsantilas, Panagiotis},
+TITLE = {A Survey on Sentiment Analysis and Opinion Mining in Greek Social Media},
+JOURNAL = {Information},
+VOLUME = {12},
+YEAR = {2021},
+NUMBER = {8},
+ARTICLE-NUMBER = {331},
+URL = {https://www.mdpi.com/2078-2489/12/8/331},
+ISSN = {2078-2489},
+DOI = {10.3390/info12080331}
+}
+```