@article{DBLP:journals/jlp/Dart91,
  author    = {Philip W. Dart},
  title     = {On Derived Dependencies and Connected Databases},
  journal   = {J. Log. Program.},
  volume    = {11},
  number    = {1{\&}2},
  year      = {1991},
  pages     = {163-188},
  ee        = {http://dx.doi.org/10.1016/0743-1066(91)90017-J},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}