@inproceedings{Stefanoni2013a,
  title = "Introducing Nominals to the Combined Query Answering Approaches for EL",
  author = "Stefanoni, Giorgio and Motik, Boris and Horrocks, Ian",
  year = "2013",
  booktitle = "Proceedings of the Twenty-Seventh AAAI Conference in Artificial Intelligence",
  keywords = "Special Track on Artificial Intelligence and the W",
  publisher = "AAAI Press",
}