1) Pearsell, S. & Pape, D. (2023): The effects of different voice qualities on the perceived personality of a speaker.

2) Sy, T. et al. (2006): Relation of employee and manager emotional intelligence to job satisfaction and performance.

3) Rosete, D. & Ciarrochi, J. (2005): Emotional intelligence and its relationship to workplace performance outcomes of leadership effectiveness.

4) World Economic Forum (2023): Future of Jobs Report 2023.

5) Leuphana Universität Lüneburg: Studie: Jeder vierte Lehrer hat Probleme mit der Stimme (Henning Zuehlsdorff, Presse und Kommunikation)