updated reference

README.md

@@ -145,9 +145,10 @@ Our best model **Midnight-92k/392** consistently outperforms or matches leading
  ```bibtex
  @article{KDK2025,
    title={Training state-of-the-art pathology foundation models with orders of magnitude less data},
-   author={Mikhail Karasikov, Joost van Doorn, Nicolas Känzig, Melis Erdal Cesur, Hugo Horlings, Robert Berke, Fei Tang, Sebastian Otálora},
+   author={Mikhail Karasikov and Joost van Doorn and Nicolas Känzig and Melis Erdal Cesur and Hugo Mark Horlings and Robert Berke and Fei Tang and Sebastian Otálora},
    year={2025},
-   journal={arXiv preprint}
+   journal={arXiv preprint arXiv:2504.05186},
+   url={https://arxiv.org/abs/2504.05186},
 }
 ```