docs(README): add bibtex citation

README.md

@@ -344,3 +344,19 @@ Your answer letter:
 # Languages
 
 The list of languages availabe in MVL-SIB is available [here](https://github.com/facebookresearch/flores/blob/main/flores200/README.md#languages-in-flores-200). In addition, [SIB-200](https://huggingface.co/datasets/Davlan/sib200) also adds N'Koo.
+
+# Citation
+
+Should you be using MVL-SIB or refer to the findings of our paper, please cite us per below:
+
+```
+@misc{schmidt2025mvlsibmassivelymultilingualvisionlanguage,
+      title={MVL-SIB: A Massively Multilingual Vision-Language Benchmark for Cross-Modal Topical Matching}, 
+      author={Fabian David Schmidt and Florian Schneider and Chris Biemann and Goran Glavaš},
+      year={2025},
+      eprint={2502.12852},
+      archivePrefix={arXiv},
+      primaryClass={cs.CL},
+      url={https://arxiv.org/abs/2502.12852}, 
+}
+```