C. Mumme and N. Pinkwart. Evaluation of an Autonomous DVD Sales Agent. Poster Proceedings of the 10th International Conference on Intelligent Virtual Agents (IVA), 2010. C. Mumme. Verkaufsagenten in Multiversen. 2009. C. Mumme, N. Pinkwart, and F. Loll. Design and Implementation of a Virtual Salesclerk. Proceedings of the 9th International Conference on Intelligent Virtual Agents (IVA), Springer Verlag, issue 5773, 2009.