A. Cohn, D. Hogg, R. Möller, and B. Neumann (Eds.) volume 08091 of Dagstuhl Seminar Proceedings, Dagstuhl, Germany, Schloss Dagstuhl--Leibniz-Zentrum für Informatik, (2008)
S. Kahn, T. Klug, and F. Flentge. TMR '07: Proceedings of the ICMI 2007 Workshop on Tagging, Mining and Retrieval of Human Related Activity Information, Nagoya, Japan, page 27-34. (2007)