1. Adler, B. T., & de Alfaro, L. (2007). A content-driven reputation system for the Wikipedia. WWW’07. doi:
10.1145/1242572.1242608
.
2. Alexa Internet, Inc. (2009). Alexa traffic rank.
http://www.alexa.com/siteinfo/wikipedia.org
. Accessed Dec 2009.
3. Almeida, R., Mozafari, B., & Cho, J. (2007, March 26–28). On the evolution of Wikipedia. Paper presented at the 1st international conference on weblogs and social media, Boulder, CO.
4. Amitay, E., Har’El, N., Sivan, R., & Soffer, A. (2004). Web-a-where: Geotagging web content. SIGIR’04. doi:
10.1145/1008992.1009040
.
5. Balk, D., & Yetman, G. (2004). Gridded population of the world (GPWv3).
http://sedac.ciesin.columbia.edu/gpw/
. Accessed Feb 2010.