@article{Codd74:0,
  title = {Understanding Relations (Third Installment)},
  author = {E. F. Codd},
  year = {1974},
  tags = {e-science},
  researchr = {https://researchr.org/publication/Codd74%3A0},
  cites = {0},
  citedby = {0},
  journal = {SIGMOD Record},
  volume = {6},
  number = {2},
  pages = {24-25},
}