Making Digital Signatures Work across National Borders. - Jon Ølnes; Anette Andresen; Leif Buene; Olga Cerrato; Håvard Grindheim (ISSE, 2007)

Quality of Subsumption Hierarchies in Ontologies. - Geir Solskinnsbakk; Jon Atle Gulla; Veronika Haderlein; Per Myrseth; Olga Cerrato (NLDB, 2009)

Time Challenges - Challenging Times for Future Information Search. - Thomas Mestl; Olga Cerrato; Jon Ølnes; Per Myrseth; Inger-Mette Gustavsen (D Lib Mag., 2009)

Semantic Drift in Ontologies. - Jon Atle Gulla; Geir Solskinnsbakk; Per Myrseth; Veronika Haderlein; Olga Cerrato (WEBIST (2), 2010)

Concept Signatures and Semantic Drift. - Jon Atle Gulla; Geir Solskinnsbakk; Per Myrseth; Veronika Haderlein; Olga Cerrato (WEBIST (Selected Papers), 2010)

Quality of hierarchies in ontologies and folksonomies. - Geir Solskinnsbakk; Jon Atle Gulla; Veronika Haderlein; Per Myrseth; Olga Cerrato (Data Knowl. Eng., 2012)