Haas, M., Jakubovski, E., Fremer, C., Dietrich, A., Hoekstra, P. J., Jäger, B., & Müller-Vahl, K. R. (2021). Yale Global Tic Severity Scale (YGTSS): Psychometric Quality of the Gold Standard for Tic Assessment Based on the Large-Scale EMTICS Study. Front Psychiatry.

Haas, Martina, Ewgeni Jakubovski, Carolin Fremer, Andrea Dietrich, Pieter J. Hoekstra, Burkard Jäger, and Kirsten R. Müller-Vahl. "Yale Global Tic Severity Scale (YGTSS): Psychometric Quality of the Gold Standard for Tic Assessment Based On the Large-Scale EMTICS Study." Front Psychiatry 2021.

Haas, Martina, et al. "Yale Global Tic Severity Scale (YGTSS): Psychometric Quality of the Gold Standard for Tic Assessment Based On the Large-Scale EMTICS Study." Front Psychiatry 2021.