adding dataset citation in readme

README.md

@@ -49,7 +49,15 @@ This dataset was built and is maintained by Maxime Guénette (@mguenette), Mathi
 
 ### Cite the Dataset
 
-<!-- add Bibtex citation for the dataset-->
+> Guénette, M., Verstraete, M., Chagué, A., & Vitali-Rosati, M. Codex palatinus graecus 23 - Ground Truth Dataset Medieval Greek Manuscripts [Data set]. https://gitlab.huma-num.fr/ecrinum/anthologia/htr_cpgr23
+
+```
+@misc{Guenette_Codex_palatinus_graecus,
+author = {Guénette, Maxime and Verstraete, Mathilde and Chagué, Alix and Vitali-Rosati, Marcello},
+title = {{Codex palatinus graecus 23 - Ground Truth Dataset Medieval Greek Manuscripts}},
+url = {https://gitlab.huma-num.fr/ecrinum/anthologia/htr_cpgr23}
+}
+```
 
 ### Cite the Project
 
@@ -61,4 +69,4 @@ This dataset was built and is maintained by Maxime Guénette (@mguenette), Mathi
 
 ## Infrastructure
 
-This project relied on the [CREMMA](https://cremmacall.sciencescall.org/) infrastructure.
\ No newline at end of file
+This dataset project relied on the [CREMMA](https://cremmacall.sciencescall.org/) infrastructure.
\ No newline at end of file