@misc{codd93,
  author = {Codd, E. F. and Codd, S. B. and Salley, C. T.},
  interhash = {6e4e09d259563b8dfce44598d28f7c73},
  intrahash = {022cc8086c9016d492ea34ef95c68796},
  note = {White paper},
  publisher = {E. F. Codd \& Associates},
  title = {{Providing OLAP (On-Line Analytical Processing) to User-Analysis:
    An IT Mandate}},
  year = 1993
}