@article{Jeffrey00,
  title = {Preface},
  author = {Alan Jeffrey},
  year = {2000},
  url = {http://www.elsevier.com/gej-ng/31/29/23/76/34/show/Products/notes/index.htt#001},
  researchr = {https://researchr.org/publication/Jeffrey00},
  cites = {0},
  citedby = {0},
  journal = {Electronic Notes in Theoretical Computer Science},
  volume = {41},
  number = {3},
  pages = {89},
}