@article{Libkin99a,
  title = {Database Principles Column - Introduction},
  author = {Leonid Libkin},
  year = {1999},
  tags = {principles, database},
  researchr = {https://researchr.org/publication/Libkin99a},
  cites = {0},
  citedby = {0},
  journal = {SIGMOD Record},
  volume = {28},
  number = {4},
  pages = {29},
}