F. Ma, W. Wang, and Z. Deng. Social Media Retrieval and Mining, volume 387 of Communications in Computer and Information Science, Springer, Berlin/Heidelberg, (2013)
P. Seitlinger, D. Kowald, C. Trattner, and T. Ley. Proceedings of the 22nd ACM international conference on Conference on information &\#38; knowledge management, page 2381--2386. New York, NY, USA, ACM, (2013)