M. Phillips, J. Nguyen, und A. Mischke. Advances in Speech Recognition: Mobile Environments, Call Centers and Clinics, Kapitel 3, Springer, New York, (2010)
K. Boyer, E. Ha, M. Wallis, R. Phillips, M. Vouk, und J. Lester. Proceeding of the 2009 conference on Artificial Intelligence in Education: Building Learning Systems that Care: From Knowledge Representation to Affective Modelling, Seite 141--148. Amsterdam, The Netherlands, The Netherlands, IOS Press, (2009)