Web Metadata Semantics - On the Road to Well-Formed Topic Maps. - Richard Widhalm; Thomas A. Mück (WISE (2), 2001)

Topic Maps. - Thomas A. Mück; Richard Widhalm (Wirtschaftsinf., 2001)

Topic Maps - Semantische Suche im Internet. - Richard Widhalm; Thomas A. Mück (Springer, 2002)

Merging Topics in Well-Formed XML Topic Maps. - Richard Widhalm; Thomas A. Mück (ISWC, 2003)