Crowd-Sourcing Fuzzy and Faceted Classification for Concept Search. - Richard Absalom; Markus Luczak-Rösch; Dap Hartmann; Aske Plaat (CoRR, 2014)

Collective Intelligence or Collecting Intelligence? - Richard Absalom; Dap Hartmann; Aelita Skarzauskiené (INSCI, 2016)