Covering the semantic space of tourism: an approach based on modularized ontologies. - Robert Barta; Christina Feilmayr; Birgit Pröll; Christoph Grün; Hannes Werthner (CIAO@ESWC, 2009)

Semantic SOS over Virtual Topic Maps. - Robert Barta; Thomas Bleier; Lara Spendier (South Afr. Comput. J., 2009)