@article{vagpovisionaugmentedasymmetricgroupprefe,
  title = {VAGPO: Vision-augmented Asymmetric Group Preference Optimization for Graph Routing Problems},
  author = {Shiyan Liu and Bohan Tan and Zhiguang Cao and Yan Jin},
  year = {2025},
  eprint = {2508.01774},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2508.01774},
}