@article{JMLR:v27:23-1535,
  author  = {Nathan Kallus and Xiaojie Mao and Masatoshi Uehara and Zhiheng Zhang},
  title   = {Causal Inference under Unmeasured Confounding with Negative Controls: A Minimax Learning Approach},
  journal = {Journal of Machine Learning Research},
  year    = {2026},
  volume  = {27},
  number  = {209},
  pages   = {1--113},
  url     = {http://jmlr.org/papers/v27/23-1535.html}
}