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1. Citizendium Turns Five, but the Wikipedia Fork Is Dead in the Water

2. ​ Wikipedia Résumé

3. Google Knol Six Months Later: Wikipedia Need Not Worry

4. 1997-frey.pdf

5. Pay Enough Or Don’t Pay At All

6. Do Incentive Contracts Crowd Out Voluntary Cooperation?

7. https://www.amazon.com/Gift-Relationship-Human-Social-Policy/dp/1565844033

8. https://www.jstor.org/stable/10.1086/468061

9. https://stuermer.ch/blog/documents/ethz_LinuxTag2007_CrowdingEffects.pdf

10. Pay Enough or Don't Pay at All

11. Flipping Coins through Mechanical Turk: Part 2

12. https://web.archive.org/web/20110721034717/http://knol.google.com/k/knol-announcements-and-release-notes

13. Abandoned Knol

14. http://knol.google.com/k

15. https://web.archive.org/web/20100316162413/http://knol.google.com/k/basic-accounting-concepts-2-debits-and-credits

16. https://stats.grok.se/en/201109/Accountancy

17. Category:Book:Accountancy

18. https://old.reddit.com/domain/knol.google.com

19. English Wikipedia on Reddit

20. Poor Google Knol Has Gone From A Wikipedia Killer To A Craigslist Wannabe

21. https://web.archive.org/web/20120607130330/http://www.quantcast.com/knol.google.com

22. https://www.internetworldstats.com/emarketing.htm

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25. A Fall Sweep

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27. Google Knol Will Be Shutdown in 2011

28. Google Knol Will Be Shutdown in 2012

29. Google Knol Will Be Shutdown in 2013

30. Google Knol Will Be Shutdown in 2014

31. Google Knol Will Be Shutdown in 2015

32. Google Knol Will Be Shutdown in 2016

33. Google Knol's Shutdown Will Leave the Knols' Content Publicly Accessible at Some URL

34. ​ Predicting Google closures

35. Official Google Blog: More Spring Cleaning out of Season

36. Annotum

37. Google Knols Move to WordPress: The Annotum Platform

38. Archiveteam

39. ​ Prediction Markets

40. https://www.wired.com/2011/06/inside-google-plus-social/

41. Wikipedia Bibliography:

    1. Knol  :

       https://en.wikipedia.org/wiki/Knol

    2. Ars Technica

    3. Special:Statistics

    4. Nupedia

    5. Creative Commons

    6. GNU Free Documentation License

    7. UseModWiki  :

       https://en.wikipedia.org/wiki/UseModWiki

    8. WikiWikiWeb [C2, Ward’s Wiki]  :

       https://en.wikipedia.org/wiki/WikiWikiWeb

    9. Free content

    10. Uptime  :

        https://en.wikipedia.org/wiki/Uptime

    11. Wikipedia:Featured articles  :

        https://en.wikipedia.org/wiki/Wikipedia:Featured_articles

    12. Motivation crowding theory  :

        https://en.wikipedia.org/wiki/Motivation_crowding_theory

    13. Amazon Mechanical Turk

    14. Google Wave  :

        https://en.wikipedia.org/wiki/Google_Wave

    15. Google+  :

        https://en.wikipedia.org/wiki/Google%2B

    16. Accounting

    17. Quantcast  :

        https://en.wikipedia.org/wiki/Quantcast

    18. Citizendium  :

        https://en.wikipedia.org/wiki/Citizendium

    19. GeoCities

    20. Delicious (website)

    21. Flickr

    22. Category:Discontinued Google services

    23. Google Notebook  :

        https://en.wikipedia.org/wiki/Google_Notebook

    24. Google Answers  :

        https://en.wikipedia.org/wiki/Google_Answers

    25. Google Base  :

        https://en.wikipedia.org/wiki/Google_Base

    26. GOOG-411  :

        https://en.wikipedia.org/wiki/GOOG-411

    27. Google Lively  :

        https://en.wikipedia.org/wiki/Google_Lively

    28. Google Mashup Editor  :

        https://en.wikipedia.org/wiki/Google_Mashup_Editor

    29. Google Page Creator  :

        https://en.wikipedia.org/wiki/Google_Page_Creator

    30. Google Sites  :

        https://en.wikipedia.org/wiki/Google_Sites

    31. Google SearchWiki  :

        https://en.wikipedia.org/wiki/Google_SearchWiki

    32. List of Google products § Discontinued in 2007  :

        https://en.wikipedia.org/wiki/List_of_Google_products#Discontinued_in_2007

    33. X Development  :

        https://en.wikipedia.org/wiki/X_Development

    34. Google Code Search  :

        https://en.wikipedia.org/wiki/Google_Code_Search

    35. IGoogle  :

        https://en.wikipedia.org/wiki/IGoogle

    36. Google Buzz  :

        https://en.wikipedia.org/wiki/Google_Buzz

    37. Jaiku  :

        https://en.wikipedia.org/wiki/Jaiku

    38. Google Groups  :

        https://en.wikipedia.org/wiki/Google_Groups

    39. Static web page  :

        https://en.wikipedia.org/wiki/Static_web_page

    40. Larry Page