update paper reference in readme

Author: saramontese

README.md

@@ -2,7 +2,7 @@
 
 <div align="center">
 
-[![Paper](https://img.shields.io/badge/Paper-10.5555/3635637.3663299-f6c628.svg)](https://arxiv.org/pdf/2505.08404)
+[![Paper](https://img.shields.io/badge/Paper-10.1007%2F978‑3‑032‑01399‑6_3-f6c628.svg?logo=springer&logoColor=white)](https://link.springer.com/chapter/10.1007/978-3-032-01399-6_3)
 <br/>
 [![Website](https://img.shields.io/badge/Website-HPAI-8A2BE2.svg)](https://hpai.bsc.es)
 [![GitHub](https://img.shields.io/badge/GitHub-HPAI--BSC-%23121011.svg?logo=github&logoColor=white.svg)](https://github.com/HPAI-BSC)
@@ -121,13 +121,18 @@ The IPG generated by this example is already present in `data/sets/intentions` f
 ## Citation
 
 ```
-@inproceedings{montese_ipg4av_2025,
-author = {Montese, Sara and Gimenez-Abalos, Victor and Cortés, Atia and Cortés, Ulises and Alvarez-Napagao, Sergio},
-title = {Explaining Autonomous Vehicles with Intention-aware Policy Graphs},
-year = {2025},
-TODO: EXTRAAMAS block
+@InProceedings{10.1007/978-3-032-01399-6_3,
+author="Montese, Sara and Gimenez-Abalos, Victor and Cortés, Atia and Cortés, Ulises and Alvarez-Napagao, Sergio",
+editor="Calvaresi, Davide and Najjar, Amro and Omicini, Andrea and Aydogan, Reyhan and Carli, Rachele and Ciatto, Giovanni and Tiribelli, Simona and Fr{\"a}mling, Kary",
+title="Explaining Autonomous Vehicles with Intention-Aware Policy Graphs",
+booktitle="Explainable, Trustworthy, and Responsible AI and Multi-Agent Systems",
+year="2026",
+publisher="Springer Nature Switzerland",
+address="Cham",
+pages="40--57"
 }
 
+
 ```
 
 ## References