↑ Dorothee Wiegand: "Entdeckungsreise. Digitale Enzyklopädien erklären die Welt." c't 6/2007, March 5, 2007, p. 136-145. Original quote: "Wir haben in den Texten der freien Enzyklopädie nicht mehr Fehler gefunden als in denen der kommerziellen Konkurrenz"
↑ See author acknowledged comments in response to the citation of the Nature study, at PLoS One, 2014, "Citation of fundamentally flawed Nature quality 'study'", In response to T. Yasseri et al. (2012) Dynamics of Conflicts in Wikipedia, Published 20 June 2012, DOI 10.1371/journal.pone.0038869, see Lưu trữ 2016-01-16 tại Wayback Machine [1], accessed 21 July 2014.
↑ Michael Kurzidim: Wissenswettstreit. Die kostenlose Wikipedia tritt gegen die Marktführer Encarta und Brockhaus an, in: c't 21/2004, October 4, 2004, S. 132–139.
↑ Studying Cooperation and Conflict between Authors with history flow Visualizations, Fernanda et al, CHI 2004, Volume 6, Number 1, April, Vienna, Austria
↑ Charles Seife (2014). Virtual Unreality: Just Because the Internet Told You, how Do You Know It's True?. Penguin Publishing Group. pp. 26–29, 32–34, 201. ISBN 978-0-670-02608-1
↑ PC Pro magazine, August 2007, p. 136, "Wikipedia Uncovered"
