@inproceedings{simpson,
  author = {R. M. Simpson and T. L. McCluskey and W. Zhao and R. S. Aylett and C. Doniat},
  title = {GIPO: An Integrated Graphical Tool to Support Knowledge Engineering in AI Planning},
  booktitle = {ECP-01. Sixth European Conference on Planning, Toledo, Spain},
  year = {2001},
  pages = {445-448}
}