@phdthesis{us-5094,
  title = {Planning with constraints},
  author = {Mark Stefik},
  year = {1980},
  url = {https://searchworks.stanford.edu/view/823271},
  researchr = {https://researchr.org/publication/us-5094},
  cites = {0},
  citedby = {0},
  school = {Stanford University, USA},
}