Ke Zhang, Konstantinos Pelechrinis, and Theodoros Lappas
Analyzing and Modeling Special Offer Campaigns in Location-based Social Networks.
ICWSM 2015 – (Acceptance Rate: 19%) 
Featured in Pitt News, Pittsburgh Post Gazette, Communiations of the ACM,
Pittsburgh’s NPR News Station, Radio PA, Bloomberg Business,
Pitt News, GeoMarketing, World News.

Aris Gionis, Theodoros Lappas, Konstantinos Pelechrinis, and Evimaria Terzi
Customized Tour Recommendations in Urban Areas.
WSDM 2014 – (Acceptance Rate: 18%)

Dimitrios Kotzias, Theodoros Lappas and Dimitrios Gunopulos.
Addressing the Sparsity of Location Information on Twitter.
EDBT/ICDT Workshop, 2014.
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K. Zhang, Qiuye Jin, K. Pelechrinis and Theodoros Lappas.
On the Importance of Temporal Dynamics in Modeling Urban Activity.
ACM SIGKDD Workshop on Urban Computing, Chicago, IL, August 2013
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Theodoros Lappas, Kunal Punera and Tamas Sarlos
Mining Tags Using Social Endorsement Networks.
SIGIR 2011 – (Acceptance Rate: 20%)
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Theodoros Lappas, Evimaria Terzi, Dimitrios Gunopulos and Heikki Mannila
Finding Effectors in Social Networks.
SIGKDD 2010 – (Acceptance Rate:15%)
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Theodoros Lappas and Dimitrios Gunopulos
Interactive Recommendations in Social Endorsement Networks.
RECSYS 2010 – (Acceptance Rate 19%) 
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Theodoros Lappas, K. Pelechrinis, M.Faloutsos and S.V.Krishnamurthy
A Simple Conceptual Generator for the Internet Graph
LANMAN 2010 (Invited Paper)
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