@inproceedings{KerolaF81,
  title = {A Comparison of Lifecycle Models},
  author = {Pentti Kerola and Peter Freeman},
  year = {1981},
  tags = {meta-model, Meta-Environment},
  researchr = {https://researchr.org/publication/KerolaF81},
  cites = {0},
  citedby = {0},
  pages = {90-99},
  booktitle = {ICSE},
}