add citation

README.md

@@ -78,10 +78,21 @@ Non-default training parameters are:
 | SHP | 81.6 |
 
 
-## Authors and references
-### Authors
-Sophie Arnoult, Lodewijk Petram and Piek Vossen
-
-### Reference
-This model was fine-tuned as part of experiments for a paper accepted at [LaTeCH-CLfL 2021](https://sighum.wordpress.com/events/latech-clfl-2021/accepted-papers/): *Batavia asked for advice. Pretrained language models for Named Entity Recognition in historical texts.* 
+## Reference
+The model and fine-tuning data presented here were developed as part of:
+```bibtex
+@inproceedings{arnoult-etal-2021-batavia,
+    title = "Batavia asked for advice. Pretrained language models for Named Entity Recognition in historical texts.",
+    author = "Arnoult, Sophie I.  and
+      Petram, Lodewijk  and
+      Vossen, Piek",
+    booktitle = "Proceedings of the 5th Joint SIGHUM Workshop on Computational Linguistics for Cultural Heritage, Social Sciences, Humanities and Literature",
+    month = nov,
+    year = "2021",
+    address = "Punta Cana, Dominican Republic (online)",
+    publisher = "Association for Computational Linguistics",
+    url = "https://aclanthology.org/2021.latechclfl-1.3",
+    pages = "21--30"
+}
+```