Reference:

M. Nickles, T. Froehner, R. Cobos, and G. Weiß. Multi-source knowledge bases and ontologies with multiple individual and social viewpoints. In Proceedings of The 2005 IEEE/WIC/ACM International Conference on Web Intelligence (WI'05). IEEE Computer Society Press, 2005.

Suggested BibTeX entry:

@inproceedings{wi05,
    author = {M. Nickles and T. Froehner and R. Cobos and G. Wei{\ss}},
    booktitle = {Proceedings of The 2005 IEEE/WIC/ACM International Conference on Web Intelligence (WI'05)},
    publisher = {IEEE Computer Society Press},
    title = {Multi-Source Knowledge Bases and Ontologies with Multiple Individual and Social Viewpoints},
    year = {2005}
}