@inbook{146,
  author = {Paul de Clercq} and Katharina Kaiser and Arie Hasman},
  title = {Computer-interpretable Guideline Formalisms},
  year = {2008},
  journal = {Computer-based Medical Guidelines and Protocols: A Primer and Current Trends},
  volume = {139},
  chapter = {2},
  pages = {22–43},
  publisher = {IOS Press},
  issn = {978-1-58603-873-1},
}