SavnikTM99'

@article{DBLP:journals/dke/SavnikTM99,
  author    = {Iztok Savnik and
               Zahir Tari and
               Tomaz Mohoric},
  title     = {QAL: A Query Algebra of Complex Objects},
  journal   = {Data Knowl. Eng.},
  volume    = {30},
  number    = {1},
  year      = {1999},
  pages     = {57-94},
  ee        = {http://dx.doi.org/10.1016/S0169-023X(98)00049-4},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}