Update README.md

README.md

@@ -77,10 +77,13 @@ Wikipedia, plus RAGTruth and 14-language PsiloQA.
 ## Citing
 
 ```bibtex
-@article{Kovacs2025LettuceDetect,
-  title={LettuceDetect: A Hallucination Detection Framework for RAG Applications},
-  author={Kovács, Ádám and Recski, Gábor},
-  journal={arXiv preprint arXiv:2502.17125},
-  year={2025}
+@misc{kovács2026documentgroundingspanlevelhallucination,
+      title={Beyond Document Grounding: Span-Level Hallucination Detection over Code, Tool Output, and Documents}, 
+      author={Ádám Kovács and Bowei He and Xue Liu and István Boros and Szilveszter Tóth and Gábor Recski},
+      year={2026},
+      eprint={2607.00895},
+      archivePrefix={arXiv},
+      primaryClass={cs.CL},
+      url={https://arxiv.org/abs/2607.00895}, 
 }
 ```