Research conducted by Uta Bergmann
Research conducted by Fabienne Hoffmann, Eva-Maria Scheiwiller-Lorber and Eva Zangger Hausherr; supervisors: B. Kurmann-Schwarz and S. Trümpler
Research conducted by Eva-Maria Scheiwiller-Lorber; supervisor: Brigitte Kurmann-Schwarz
Research conducted by Christine Hediger and Angela Schiffhauer; supervisor: Brigitte Kurmann-Schwarz
University of Fribourg, Switzerland