@article{mappingequivalenceandoidequivalenceof,
  title = {Mapping-equivalence and oid-equivalence of single-function object-creating conjunctive queries},
  author = {Angela Bonifati and Werner Nutt and Riccardo Torlone and Jan Van den Bussche},
  year = {2015},
  eprint = {1503.01707},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1503.01707v2},
}