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2. Measuring the effect of fundamental frequency raising as a strategy for increasing vocal intensity in soft, normal and loud phonation;Alku;Speech Communication,2002
3. Birkholz, P., 2020. Image3d. [software]. http://www.vocaltractlab.de/index.php?page=image3d-about.
4. Influence of temporal discretization schemes on formant frequencies and bandwidths in time domain simulations of the vocal tract system;Birkholz,2004
5. Control of an articulatory speech synthesizer based on dynamic approximation of spatial articulatory targets;Birkholz,2007