@inproceedings{WangWTPA09a,
  title = "Concept and Role Forgetting in {ALC}",
  author = "Kewen Wang and Zhe Wang and Rodney Topor and Jeff Z. Pan and Grigoris Antoniou",
  year = "2009",
  booktitle = "Proceedings of the 8th International Semantic Web Conference (ISWC 2009)",
  pages = "666-681",
}