Update README.md

README.md

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----
-license: apache-2.0
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+---
+license: apache-2.0
+---
+
+Validation set used for job-to-skill and skill-to-job in the WorkBench paper, please cite:
+```bibtex
+@misc{delange2025unifiedworkembeddings,
+      title={Unified Work Embeddings: Contrastive Learning of a Bidirectional Multi-task Ranker}, 
+      author={Matthias De Lange and Jens-Joris Decorte and Jeroen Van Hautte},
+      year={2025},
+      eprint={2511.07969},
+      archivePrefix={arXiv},
+      primaryClass={cs.CL},
+      url={https://arxiv.org/abs/2511.07969}, 
+}
+```