Response to "Why Codd's Rule No. 6 Must be Reformulated".

@article{DBLP:journals/sigmod/Codd89,
  author    = {E. F. Codd},
  title     = {Response to "Why Codd's Rule No. 6 Must be Reformulated"},
  journal   = {SIGMOD Record},
  volume    = {18},
  number    = {1},
  year      = {1989},
  pages     = {16},
  ee        = {db/journals/sigmod/Codd89.html},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

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References

[1]

H. W. Buff: Why Codd's Rule No. 6 Must be Reformulated. SIGMOD Record 17(4): 79-80(1988)