Update README.md

README.md

@@ -23,6 +23,17 @@ If you use these models, please, cite as follows:
 }
 ```
 
-More information about the models is explained in this article: 
+If you use the relation extraction models and the concept normalization models, please, cite as follows:
+
+```
+@article{campillosetal,
+        title = {{Transformer-based relation extraction and concept normalization using an annotated clinical trials corpus}},
+        author = {Campillos-Llanos, Leonardo and Valverde-Mateos, Ana and Capllonch-Carri{\'o}n, Adri{\'a}n and Zakhir-Puig, Sof{\'i}a and Heras-Vicente, J{\'o}nathan},
+        journal = {(Under review)},
+        year={2025}
+}
+```
+
+More information about the NER models is explained in this article: 
 
 Campillos-Llanos, L., Valverde-Mateos, A. & Capllonch-Carrión, A. (2025) Hybrid natural language processing tool for semantic annotation of medical texts in Spanish. *BMC Bioinformatics* 26, 7. [https://doi.org/10.1186/s12859-024-05949-6](https://doi.org/10.1186/s12859-024-05949-6)