Add arXiv reference (2608.09276) to model card

README.md

@@ -24,6 +24,8 @@ Flamingo-style gated cross-attention. The model writes natural-prose geological
 of 51 x 67 km lunar surface tiles: units, processes, relative timing, quantitative image facts,
 and crater-count model ages on mare surfaces.
 
+Paper: **[Verifiably grounded machine interpretation of lunar geology](https://arxiv.org/abs/2608.09276)** (arXiv:2608.09276)
+
 Code, training pipeline, and evaluation: **[github.com/TechnicToms/SelenoVLM](https://github.com/TechnicToms/SelenoVLM)**
 
 ## Repository contents
@@ -95,4 +97,16 @@ Released under Apache-2.0. Upstream terms that apply in addition:
 
 ## Citation
 
-A preprint is in preparation; citation information will be added here.
+If you use this model, please cite:
+
+```bibtex
+@misc{sander2026selenovlm,
+  title   = {Verifiably grounded machine interpretation of lunar geology},
+  author  = {Sander, Tom and Wohlfarth, Kay and W{\"o}hler, Christian},
+  year    = {2026},
+  eprint  = {2608.09276},
+  archivePrefix = {arXiv},
+  primaryClass  = {cs.CL},
+  url     = {https://arxiv.org/abs/2608.09276}
+}
+```