@article{Cooper2010:generalizing,
  title = "Generalizing constraint satisfaction on trees: Hybrid tractability and variable elimination",
  author = "Martin C. Cooper and Peter G. Jeavons and Andr{\'a}s Z. Salamon",
  year = "2010",
  journal = "Artificial Intelligence",
  number = "9--10",
  pages = "570--584",
  url = "http://www.gaon.net/andras/academic/cjs-ai2010-preprint.pdf",
  volume = "174",
  doi = "10.1016/j.artint.2010.03.002",
}