Discovering topical experts in the Twitter social network
Inferring Who-is-Who in the Twitter Social Network
Naveen Kumar Sharma, Saptarshi Ghosh, Fabricio Benevenuto, Niloy Ganguly, and Krishna P. Gummadi. ACM SIGCOMM Workshop on Online Social Networks (WOSN), Helsinki, Finland, August 2012. [Highest rated paper at the workshop, included in ACM Computer Communication Review, volume 42, issue 4, pp. 533--538, October 2012]
Cognos: Crowdsourcing Search for Topic Experts in Microblogs
Saptarshi Ghosh, Naveen Kumar Sharma, Fabricio Benevenuto, Niloy Ganguly, and Krishna P. Gummadi. ACM SIGIR Conference (SIGIR), Portland, Oregon, USA, August 2012.