Update README.md

citations

README.md

@@ -9,7 +9,22 @@ The variety of available functionalities makes GEMAct modeling very flexible and
 
 Please visit our [website](https://gem-analytics.github.io/gemact/) to see our documentation and tutorial.
 
-The [pre-print](https://arxiv.org/abs/2303.01129) of the accompanying paper is now available.
+The is available at [DOI](doi:10.1017/S1748499524000022). 
+
+APA citation:
+
+Pittarello, G., Luini, E., & Marchione, M. M. (2024). GEMAct: a Python package for non-life (re)insurance modeling. Annals of Actuarial Science, 1–37. doi:10.1017/S1748499524000022
+
+BibteX citation:
+
+@article{Pittarello_Luini_Marchione_2024, 
+title={GEMAct: a Python package for non-life (re)insurance modeling}, 
+DOI={10.1017/S1748499524000022}, journal={Annals of Actuarial Science}, 
+author={Pittarello, Gabriele and Luini, Edoardo and Marchione, Manfred Marvin}, 
+year={2024}, 
+pages={1–37}} 
+
+
 
 # Acknowledgments