Gisbert L. Brunner/ Christian Pfeiffer-Belli
(3)
Christian (University of St. Gallen Pfeiffer Switzerland)
(1)
Dirk Baier (EDT)/ Christian Pfeiffer (EDT)
(1)
Elisabeth Piirainen (EDT)/ Natalia Filatkina (EDT)/ Sören Stumpf (EDT)/ Christian Pfeiffer (EDT)
(1)
Gisbert Brunner; Christian Pfeiffer-Belli
(1)