@inproceedings{Kazakov:08:SROIQ:KR,
  title = "RIQ and SROIQ are Harder than SHOIQ",
  author = "Yevgeny Kazakov",
  year = "2008",
  booktitle = "KR 2008",
  editor = "Gerhard Brewka and J{\'e}r{\^o}me Lang",
  isbn = "978-1-57735-384-3",
  pages = "274-284",
  publisher = "AAAI Press",
}