@inproceedings{CKHS07a,
  title = "A Logical Framework for Modular Integration of Ontologies",
  author = "Bernardo {Cuenca Grau} and Yevgeny Kazakov and Ian Horrocks and Ulrike Sattler",
  year = "2007",
  booktitle = "Proc.\ of the 20th Int.\ Joint Conf.\ on Artificial Intelligence (IJCAI~2007)",
  pages = "298--303",
  url = "download/2007/CKHS07a.pdf",
}