@article{zhang2026expressive,
  title        = {Facial Expression and Behavior Modeling from Digital Avatars to Expressive Humanoid Robots: A Review},
  author       = {Zhang, Xu and Cao, Longbing},
  journal      = {ACM Computing Surveys},
  year         = {2026},
  doi          = {10.1145/3856804},
  issn         = {0360-0300},
  url          = {https://doi.org/10.1145/3856804}
}