[ 2013] : "Ubiquitous Social Media Analysis Third International Workshops, MUSE 2012, Bristol, UK, September 24, 2012, and MSM 2012, Milwaukee, WI, USA, June 25, 2012, Revised Selected Papers" Atzmueller, M., Chin, A., Helic, D. and Hotho, A., eds., Imprint: Springer, Berlin, Heidelberg (2013).

[ 2013] : "Proceedings of the Fifth ACM RecSys Workshop on Recommender Systems and the Social Web co-located with the 7th ACM Conference on Recommender Systems (RecSys 2013), Hong Kong, China, October 13, 2013." Mobasher, B., Jannach, D., Geyer, W., Freyne, J., Hotho, A., Anand, S. S. and Guy, I., eds.; RSWeb@RecSys, CEUR-WS.org (2013).

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[Hotho et al. 2006] Hotho, A., Jäschke, R., Schmitz, C. and Stumme, G.: "BibSonomy: A Social Bookmark and Publication Sharing System"; Proceedings of the Conceptual Structures Tool Interoperability Workshop at the 14th International Conference on Conceptual Structures (2006), 87-102.