We were asked about our references recently, so thought a general post might help others looking for articles, projects and other information we cited in The Collective Wisdom Handbook: Perspectives on Crowdsourcing in Cultural Heritage.
Our references are published as part of the online Handbook.
While you can download or view them there, you might find our public Zotero 'group' library used when we published the Collective Wisdom Handbook much more useful: https://www.zotero.org/groups/2757147/collective_wisdom/library