fix(doc): adding reference for the tech report

README.md

@@ -272,7 +272,7 @@ Creative Commons Attribution Share Alike 4.0: https://creativecommons.org/licens
 
 ### Citation Information
 
-You should always cite the original kubhist2 release, provided below as bibtex. If you want to additionally refer to this specific version, please also add a link to the huggingface page: https://huggingface.co/datasets/iguanodon-ai/kubhist2. 
+You should always cite the original kubhist2 release, provided below as bibtex. If you want to additionally refer to this specific version, please also add a link to the huggingface page ( https://huggingface.co/datasets/iguanodon-ai/kubhist2) as well as the second bibtex. 
 
 ```bibtex
 @misc{Kubhist2,
@@ -285,6 +285,16 @@ You should always cite the original kubhist2 release, provided below as bibtex.
 
 ```
 
+```bibtex
+@techreport{hengchen2025kubhist,
+  author       = {Hengchen, Simon},
+  title        = {A huggingface version of the Kubhist newspaper archive},
+  year         = {2025},
+  howpublished = {\url{https://archive-ouverte.unige.ch/unige:187998}},
+  note         = {Accessed: 2025-10-02}
+}
+```
+
 ### Acknowledgments
 
 The compute dedicated to the creation of the dataset has been provided by [iguanodon.ai](https://iguanodon.ai).