Second-Order Dependency Theory.

Moshe Y. Vardi: Second-Order Dependency Theory. XP4.5 Workshop on Database Theory 1983:

@inproceedings{DBLP:conf/xp/Vardi83,
  author    = {Moshe Y. Vardi},
  title     = {Second-Order Dependency Theory},
  booktitle = {XP4.5 Workshop on Database Theory, 1983 Palo Alto, California,
               USA},
  year      = {1983},
  ee        = {db/conf/xp/Vardi83.html},
  crossref  = {DBLP:conf/xp/1983},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

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