@article{shen-etal-2026-vertical,
    title = "Vertical Routing: A Cost-Efficient Collaboration Routing Framework",
    author = "Shen, Si  and
      Shen, Peijun  and
      Zhu, Danhao",
    journal = "Transactions of the Association for Computational Linguistics",
    volume = "14",
    year = "2026",
    address = "Cambridge, MA",
    publisher = "MIT Press",
    url = "https://aclanthology.org/2026.tacl-1.104/",
    doi = "10.1162/tacl.a.802",
    pages = "2301--2317"
}