@article{Horrocks01m,
  title = "Combinations of Modal Logics",
  author = "B. Bennett and C. Dixon and M. Fisher and U. Hustadt and E. Franconi and I. Horrocks and M. de Rijke",
  year = "2002",
  issn = "0269-2821",
  journal = "AI Review",
  month = "MAR",
  number = "1",
  pages = "1--20",
  url = "download/2002/Horrocks01m.pdf",
  volume = "17",
}