@article{answeringconjunctivequeriesovermathcalel,
  title = {Answering Conjunctive Queries over $\mathcal{EL}$ Knowledge Bases with Transitive and Reflexive Roles},
  author = {Giorgio Stefanoni and Boris Motik},
  year = {2014},
  eprint = {1411.2516},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1411.2516v3},
}