ROLF FIEGUTH – University of Fribourg, Switzerland
MIECZYSŁAW INGLOT – University of Wrocław, Poland
WALDEMAR OKOŃ – University of Wrocław, Poland
HENRYK SIEWIERSKI – University of Brasília, Brazil
WŁADYSŁAW STRÓŻEWSKI – Jagiellonian University in Kraków, Poland
KRZYSZTOF TRYBUŚ – Adam Mickiewicz University in Poznań, Poland
JAN ZIELIŃSKI – University of Fribourg, Switzerland