A new approach to relevancy in Internet searching - the "Vox Populi Algorithm" - Andreas Schaale; Carsten Wulf-Mathies; Sönke Lieberam-Schmidt (CoRR, 2003)

Analyzing and influencing search engine results: business and technology impacts on web information retrieval. - Sönke Lieberam-Schmidt (2010)

Regional Knowledge Maps - Potentials and Challenges. - Montserrat Garcia-Alsina; Christian Wartena; Sönke Lieberam-Schmidt (KDIR/KMIS, 2013)

Challenges to Construct Regional Knowledge Maps for Territories' Sustainable Development. - Montserrat Garcia-Alsina; Christian Wartena; Sönke Lieberam-Schmidt (IC3K, 2013)