@inproceedingsHillmann_Trier_2012, title=Sentiment Polarization and Balance among Users in Online Social Networks, volume=24, booktitle=AMCIS 2012 Proceedings, publisher=Association for Information Systems. AIS Electronic Library (AISeL), author=Hillmann, Robert and Trier, Matthias, editor=Joshi, K.D. and Yoo, YoungjinEditors, year=2012 
LibreCat: /record/13326

@inproceedingsHillmann_Trier_2012, place=United States, title=Dissemination Patterns and Associated Network Effects of Sentiments in Social Networks, booktitle=Proceedings of the 2012 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining, publisher=IEEE, author=Hillmann, Robert and Trier, Matthias, year=2012, pages=510–515 
LibreCat: /record/13331