@inproceedings{Helft88,
  title = {Learning Systems of First-Order Rules},
  author = {Nicolas Helft},
  year = {1988},
  tags = {rule-based, rules},
  researchr = {https://researchr.org/publication/Helft88},
  cites = {0},
  citedby = {0},
  pages = {395-401},
  booktitle = {ML},
}