How useful are your comments?: analyzing and predicting youtube comments and comment ratings. - Stefan Siersdorfer; Sergiu Chelaru; Wolfgang Nejdl; José San Pedro (WWW, 2010)

Analyzing Political Trends in the Blogosphere. - Gianluca Demartini; Stefan Siersdorfer; Sergiu Chelaru; Wolfgang Nejdl (ICWSM, 2011)

Analyzing the Polarity of Opinionated Queries. - Sergiu Chelaru; Ismail Sengör Altingövde; Stefan Siersdorfer (ECIR, 2012)

Can Social Features Help Learning to Rank YouTube Videos? - Sergiu Viorel Chelaru; Claudia Orellana-Rodriguez; Ismail Sengör Altingövde (WISE, 2012)

Analyzing, Detecting, and Exploiting Sentiment in Web Queries. - Sergiu Chelaru; Ismail Sengör Altingövde; Stefan Siersdorfer; Wolfgang Nejdl (ACM Trans. Web, 2013)

Competitive Game Designs for Improving the Cost Effectiveness of Crowdsourcing. - Markus Rokicki; Sergiu Chelaru; Sergej Zerr; Stefan Siersdorfer (CIKM, 2014)

Recognizing skill networks and their specific communication and connection practices. - Sergiu Chelaru; Eelco Herder; Kaweh Djafari Naini; Patrick Siehndel (HT, 2014)

Analyzing and Mining Comments and Comment Ratings on the Social Web. - Stefan Siersdorfer; Sergiu Chelaru; José San Pedro; Ismail Sengör Altingövde; Wolfgang Nejdl (ACM Trans. Web, 2014)

How useful is social feedback for learning to rank YouTube videos? - Sergiu Chelaru; Claudia Orellana-Rodriguez; Ismail Sengör Altingövde (World Wide Web, 2014)

Mining, analyzing and exploiting community feedback on the web. - Sergiu Chelaru (2014)

On the Importance of Contextual Information for Building Reliable Automated Driver Identification Systems. - Li Zeng; Mohammad Al-Rifai; Sergiu Chelaru; Michael Nolting; Wolfgang Nejdl (ITSC, 2020)