[Alani 03] Alani, H.: Automatic Extraction of Knowledge from Web Documents, in Proc. of the Workshop of Human Language Technology for the Semantic Web and Web Services, 2nd Interational Semantic Web Conference (2003)
[Brickley 04] Brickley, D. and Miller, L.: in FOAF: the 'frined of a friend' vocabulary, http://xmlns.com/foaf/0.1/ (2004)
[Church 89] Church, K. W. and Hanks, P.: Word Association Norms, Mutual Information, and Lexicography, in Proc. of ACL '89, Association of Computational Linguistics, pp. 76-83 (1989)
[Davis 04] Davis, I. and Jr. E. V.: in RELATIONSHIP: A vocabulary for describing relationships between people, http://vocab.org/relationship/ (2004)