On Hierarchical Normal Forms.

@inproceedings{DBLP:conf/mfdbs/Benecke87,
  author    = {Klaus Benecke},
  editor    = {Joachim Biskup and
               J{\'a}nos Demetrovics and
               Jan Paredaens and
               Bernhard Thalheim},
  title     = {On Hierarchical Normal Forms},
  booktitle = {MFDBS 87, 1st Symposium on Mathematical Fundamentals of Database
               Systems, Dresden, GDR, January 19-23, 1987, Proceedings},
  publisher = {Springer},
  series    = {Lecture Notes in Computer Science},
  volume    = {305},
  year      = {1987},
  isbn      = {3-540-19121-6},
  pages     = {10-19},
  ee        = {db/conf/mfdbs/Benecke87.html},
  crossref  = {DBLP:conf/mfdbs/87},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

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References

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[GTW78]

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[GTWW75]

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[HKR80]

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[Rei84]

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[SS83]

Hans-Jörg Schek, Marc H. Scholl: Die NF²-Relationenalgebra zur einheitlichen Manipulation externer, konzeptueller und interner Datenstrukturen. Sprachen für Datenbanken 1983: 113-133 BibTeX