Motif Definition and Classification to Structure Non-linear Plots and to Control the Narrative Flow in Interactive Dramas. - Knut Hartmann; Sandra Hartmann; Matthias Feustel (International Conference on Virtual Storytelling, 2005)

Interactive Audiobooks: Combining Narratives with Game Elements. - Niklas Röber; Cornelius Huber; Knut Hartmann; Matthias Feustel; Maic Masuch (TIDSE, 2006)