AtseriasDK06'

BibTeX

@article{DBLP:journals/jacm/AtseriasDK06,
  author    = {Albert Atserias and
               Anuj Dawar and
               Phokion G. Kolaitis},
  title     = {On preservation under homomorphisms and unions of conjunctive
               queries},
  journal   = {J. ACM},
  volume    = {53},
  number    = {2},
  year      = {2006},
  pages     = {208-237},
  ee        = {http://doi.acm.org/10.1145/1131342.1131344},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}