Semantic Navigation on the web: the LCSH case study. - Ioannis Papadakis; Michalis Stefanidakis; Aikaterini Tzali (MTSR, 2007)

Visualizing OPAC subject headings. - Ioannis Papadakis; Michalis Stefanidakis; Aikaterini Tzali (Libr. Hi Tech, 2008)

Semantic navigating an OPAC by subject headings meta-information. - Ioannis Papadakis; Michalis Stefanidakis; Aikaterini Tzali (Electron. Libr., 2009)